66716836664082 has 64 divisors (see below), whose sum is σ = 150634334527488. Its totient is φ = 19516263840000.

The previous prime is 66716836664063. The next prime is 66716836664129. The reversal of 66716836664082 is 28046663861766.

It is a super-2 number, since 2×66716836664082² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66716836663998 and 66716836664016.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39838438 + ... + 41479329.

It is an arithmetic number, because the mean of its divisors is an integer number (2353661476992).

Almost surely, 2^{66716836664082} is an apocalyptic number.

66716836664082 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

66716836664082 is an abundant number, since it is smaller than the sum of its proper divisors (83917497863406).

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

66716836664082 is a wasteful number, since it uses less digits than its factorization.

66716836664082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81318215.

The product of its (nonzero) digits is 501645312, while the sum is 69.

The spelling of 66716836664082 in words is "sixty-six trillion, seven hundred sixteen billion, eight hundred thirty-six million, six hundred sixty-four thousand, eighty-two".