66864490936 has 32 divisors (see below), whose sum is σ = 125619737040. Its totient is φ = 33365968128.

The previous prime is 66864490909. The next prime is 66864490943. The reversal of 66864490936 is 63909446866.

It is a super-4 number, since 4×66864490936⁴ (a number of 44 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9511855 + ... + 9518881.

Almost surely, 2^66864490936 is an apocalyptic number.

It is an amenable number.

66864490936 is a deficient number, since it is larger than the sum of its proper divisors (58755246104).

66864490936 is a wasteful number, since it uses less digits than its factorization.

66864490936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9223 (or 9219 counting only the distinct ones).

The product of its (nonzero) digits is 40310784, while the sum is 61.

The spelling of 66864490936 in words is "sixty-six billion, eight hundred sixty-four million, four hundred ninety thousand, nine hundred thirty-six".