66660117504 has 88 divisors (see below), whose sum is σ = 177919999680. Its totient is φ = 22189215744.

The previous prime is 66660117497. The next prime is 66660117527. The reversal of 66660117504 is 40571106666.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2255527 + ... + 2284889.

Almost surely, 2^66660117504 is an apocalyptic number.

66660117504 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66660117504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88959999840).

66660117504 is an abundant number, since it is smaller than the sum of its proper divisors (111259882176).

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

66660117504 is a wasteful number, since it uses less digits than its factorization.

66660117504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30125 (or 30107 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 66660117504 in words is "sixty-six billion, six hundred sixty million, one hundred seventeen thousand, five hundred four".