66951357696 has 108 divisors (see below), whose sum is σ = 199264490880. Its totient is φ = 21597189120.

The previous prime is 66951357689. The next prime is 66951357721. The reversal of 66951357696 is 69675315966.

66951357696 is a `hidden beast` number, since 6 + 6 + 9 + 51 + 3 + 576 + 9 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 397266 + ... + 540113.

Almost surely, 2^66951357696 is an apocalyptic number.

It is an amenable number.

66951357696 is an abundant number, since it is smaller than the sum of its proper divisors (132313133184).

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

66951357696 is a wasteful number, since it uses less digits than its factorization.

66951357696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937432 (or 937415 counting only the distinct ones).

The product of its digits is 55112400, while the sum is 63.

The spelling of 66951357696 in words is "sixty-six billion, nine hundred fifty-one million, three hundred fifty-seven thousand, six hundred ninety-six".