66402014839776 has 1152 divisors, whose sum is σ = 263969525514240. Its totient is φ = 15286015180800.

The previous prime is 66402014839663. The next prime is 66402014839777. The reversal of 66402014839776 is 67793841020466.

It is a happy number.

66402014839776 is a `hidden beast` number, since 6 + 6 + 40 + 20 + 1 + 483 + 97 + 7 + 6 = 666.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66402014839777) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1196167861 + ... + 1196223371.

It is an arithmetic number, because the mean of its divisors is an integer number (229140213120).

Almost surely, 2^{66402014839776} is an apocalyptic number.

66402014839776 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66402014839776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131984762757120).

66402014839776 is an abundant number, since it is smaller than the sum of its proper divisors (197567510674464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66402014839776 is a wasteful number, since it uses less digits than its factorization.

66402014839776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55748 (or 55737 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 63.

The spelling of 66402014839776 in words is "sixty-six trillion, four hundred two billion, fourteen million, eight hundred thirty-nine thousand, seven hundred seventy-six".