66666594060 has 72 divisors (see below), whose sum is σ = 220605826896. Its totient is φ = 16161598080.

The previous prime is 66666594019. The next prime is 66666594077. The reversal of 66666594060 is 6049566666.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66666593988 and 66666594006.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16833019 + ... + 16836978.

It is an arithmetic number, because the mean of its divisors is an integer number (3063969818).

Almost surely, 2^66666594060 is an apocalyptic number.

66666594060 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66666594060 is an abundant number, since it is smaller than the sum of its proper divisors (153939232836).

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

66666594060 is a wasteful number, since it uses less digits than its factorization.

66666594060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33670023 (or 33670018 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 54.

The spelling of 66666594060 in words is "sixty-six billion, six hundred sixty-six million, five hundred ninety-four thousand, sixty".