66894654924 has 48 divisors (see below), whose sum is σ = 174399523200. Its totient is φ = 22173640848.

The previous prime is 66894654923. The next prime is 66894654929. The reversal of 66894654924 is 42945649866.

66894654924 is a `hidden beast` number, since 6 + 6 + 89 + 4 + 6 + 549 + 2 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (66894654923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1710822 + ... + 1749485.

It is an arithmetic number, because the mean of its divisors is an integer number (3633323400).

Almost surely, 2^66894654924 is an apocalyptic number.

It is an amenable number.

66894654924 is an abundant number, since it is smaller than the sum of its proper divisors (107504868276).

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

66894654924 is a wasteful number, since it uses less digits than its factorization.

66894654924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3460499 (or 3460491 counting only the distinct ones).

The product of its digits is 89579520, while the sum is 63.

The spelling of 66894654924 in words is "sixty-six billion, eight hundred ninety-four million, six hundred fifty-four thousand, nine hundred twenty-four".