66432578756 has 12 divisors (see below), whose sum is σ = 118960664592. Its totient is φ = 32443817448.

The previous prime is 66432578743. The next prime is 66432578761. The reversal of 66432578756 is 65787523466.

It is a junction number, because it is equal to n+sod(n) for n = 66432578695 and 66432578704.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193117790 + ... + 193118133.

It is an arithmetic number, because the mean of its divisors is an integer number (9913388716).

Almost surely, 2^66432578756 is an apocalyptic number.

It is an amenable number.

66432578756 is a deficient number, since it is larger than the sum of its proper divisors (52528085836).

66432578756 is a wasteful number, since it uses less digits than its factorization.

66432578756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386235970 (or 386235968 counting only the distinct ones).

The product of its digits is 50803200, while the sum is 59.

The spelling of 66432578756 in words is "sixty-six billion, four hundred thirty-two million, five hundred seventy-eight thousand, seven hundred fifty-six".