65566640354652 has 72 divisors (see below), whose sum is σ = 168075158509440. Its totient is φ = 21547347121440.

The previous prime is 65566640354629. The next prime is 65566640354693. The reversal of 65566640354652 is 25645304666556.

It is a super-2 number, since 2×65566640354652² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65566640354652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 172910599 + ... + 173289377.

It is an arithmetic number, because the mean of its divisors is an integer number (2334377201520).

Almost surely, 2^{65566640354652} is an apocalyptic number.

It is an amenable number.

65566640354652 is an abundant number, since it is smaller than the sum of its proper divisors (102508518154788).

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

65566640354652 is a wasteful number, since it uses less digits than its factorization.

65566640354652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446583 (or 446578 counting only the distinct ones).

The product of its (nonzero) digits is 466560000, while the sum is 63.

The spelling of 65566640354652 in words is "sixty-five trillion, five hundred sixty-six billion, six hundred forty million, three hundred fifty-four thousand, six hundred fifty-two".