66746751504 has 80 divisors (see below), whose sum is σ = 172973095680. Its totient is φ = 22178856960.

The previous prime is 66746751481. The next prime is 66746751557. The reversal of 66746751504 is 40515764766.

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, 24988089 + ... + 24990759.

It is an arithmetic number, because the mean of its divisors is an integer number (2162163696).

Almost surely, 2^66746751504 is an apocalyptic number.

It is an amenable number.

66746751504 is an abundant number, since it is smaller than the sum of its proper divisors (106226344176).

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

66746751504 is a wasteful number, since it uses less digits than its factorization.

66746751504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4128 (or 4122 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 51.

The spelling of 66746751504 in words is "sixty-six billion, seven hundred forty-six million, seven hundred fifty-one thousand, five hundred four".