66486946932 has 144 divisors (see below), whose sum is σ = 205407498240. Its totient is φ = 18532886400.

The previous prime is 66486946919. The next prime is 66486946937. The reversal of 66486946932 is 23964968466.

66486946932 is a `hidden beast` number, since 6 + 6 + 486 + 94 + 69 + 3 + 2 = 666.

It is a super-2 number, since 2×66486946932² (a number of 22 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66486946932.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66486946937) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 63757 + ... + 370187.

It is an arithmetic number, because the mean of its divisors is an integer number (1426440960).

Almost surely, 2^66486946932 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66486946932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102703749120).

66486946932 is an abundant number, since it is smaller than the sum of its proper divisors (138920551308).

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

66486946932 is a wasteful number, since it uses less digits than its factorization.

66486946932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306499 (or 306484 counting only the distinct ones).

The product of its digits is 80621568, while the sum is 63.

The spelling of 66486946932 in words is "sixty-six billion, four hundred eighty-six million, nine hundred forty-six thousand, nine hundred thirty-two".