66826193920 has 44 divisors (see below), whose sum is σ = 160304565744. Its totient is φ = 26730475520.

The previous prime is 66826193909. The next prime is 66826193923. The reversal of 66826193920 is 2939162866.

It is not an unprimeable number, because it can be changed into a prime (66826193923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6520876 + ... + 6531115.

Almost surely, 2^66826193920 is an apocalyptic number.

It is an amenable number.

66826193920 is an abundant number, since it is smaller than the sum of its proper divisors (93478371824).

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

66826193920 is a wasteful number, since it uses less digits than its factorization.

66826193920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13052016 (or 13051998 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 52.

The spelling of 66826193920 in words is "sixty-six billion, eight hundred twenty-six million, one hundred ninety-three thousand, nine hundred twenty".