66084974520 has 64 divisors (see below), whose sum is σ = 198285300000. Its totient is φ = 17619959808.

The previous prime is 66084974491. The next prime is 66084974551. The reversal of 66084974520 is 2547948066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 816856 + ... + 894104.

Almost surely, 2^66084974520 is an apocalyptic number.

66084974520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66084974520 is an abundant number, since it is smaller than the sum of its proper divisors (132200325480).

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

66084974520 is a wasteful number, since it uses less digits than its factorization.

66084974520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84392 (or 84388 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 66084974520 in words is "sixty-six billion, eighty-four million, nine hundred seventy-four thousand, five hundred twenty".