66418368504 has 32 divisors (see below), whose sum is σ = 166124631120. Its totient is φ = 22128961536.

The previous prime is 66418368479. The next prime is 66418368547. The reversal of 66418368504 is 40586381466.

It is a super-2 number, since 2×66418368504² (a number of 22 digits) contains 22 as substring.

It is a congruent 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, 604147 + ... + 705570.

Almost surely, 2^66418368504 is an apocalyptic number.

It is an amenable number.

66418368504 is an abundant number, since it is smaller than the sum of its proper divisors (99706262616).

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

66418368504 is a wasteful number, since it uses less digits than its factorization.

66418368504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1311839 (or 1311835 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 51.

The spelling of 66418368504 in words is "sixty-six billion, four hundred eighteen million, three hundred sixty-eight thousand, five hundred four".