66520624344 has 32 divisors (see below), whose sum is σ = 170796199920. Its totient is φ = 21574256256.

The previous prime is 66520624319. The next prime is 66520624349. The reversal of 66520624344 is 44342602566.

It is a junction number, because it is equal to n+sod(n) for n = 66520624296 and 66520624305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66520624349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37454419 + ... + 37456194.

Almost surely, 2^66520624344 is an apocalyptic number.

It is an amenable number.

66520624344 is an abundant number, since it is smaller than the sum of its proper divisors (104275575576).

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

66520624344 is a wasteful number, since it uses less digits than its factorization.

66520624344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74910659 (or 74910655 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 42.

The spelling of 66520624344 in words is "sixty-six billion, five hundred twenty million, six hundred twenty-four thousand, three hundred forty-four".