66740633487360 has 3456 divisors, whose sum is σ = 288273545239680. Its totient is φ = 14219476992000.

The previous prime is 66740633487343. The next prime is 66740633487371. The reversal of 66740633487360 is 6378433604766.

It is a happy number.

66740633487360 is a `hidden beast` number, since 6 + 67 + 4 + 0 + 6 + 33 + 487 + 3 + 60 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 660798351310 + ... + 660798351410.

It is an arithmetic number, because the mean of its divisors is an integer number (83412484155).

Almost surely, 2^{66740633487360} is an apocalyptic number.

66740633487360 is a gapful number since it is divisible by the number (60) 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 66740633487360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144136772619840).

66740633487360 is an abundant number, since it is smaller than the sum of its proper divisors (221532911752320).

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

66740633487360 is a wasteful number, since it uses less digits than its factorization.

66740633487360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 285 counting only the distinct ones).

The product of its (nonzero) digits is 219469824, while the sum is 63.

The spelling of 66740633487360 in words is "sixty-six trillion, seven hundred forty billion, six hundred thirty-three million, four hundred eighty-seven thousand, three hundred sixty".