66321303524 has 48 divisors (see below), whose sum is σ = 135009692160. Its totient is φ = 27917516160.

The previous prime is 66321303493. The next prime is 66321303541. The reversal of 66321303524 is 42530312366.

It is a super-2 number, since 2×66321303524² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1183589 + ... + 1238355.

It is an arithmetic number, because the mean of its divisors is an integer number (2812701920).

Almost surely, 2^66321303524 is an apocalyptic number.

It is an amenable number.

66321303524 is an abundant number, since it is smaller than the sum of its proper divisors (68688388636).

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

66321303524 is a wasteful number, since it uses less digits than its factorization.

66321303524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55548 (or 55546 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 35.

The spelling of 66321303524 in words is "sixty-six billion, three hundred twenty-one million, three hundred three thousand, five hundred twenty-four".