66004237880 has 64 divisors (see below), whose sum is σ = 169932003840. Its totient is φ = 22602448512.

The previous prime is 66004237867. The next prime is 66004237919. The reversal of 66004237880 is 8873240066.

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, 87227 + ... + 373653.

It is an arithmetic number, because the mean of its divisors is an integer number (2655187560).

Almost surely, 2^66004237880 is an apocalyptic number.

It is an amenable number.

66004237880 is an abundant number, since it is smaller than the sum of its proper divisors (103927765960).

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

66004237880 is a wasteful number, since it uses less digits than its factorization.

66004237880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287268 (or 287264 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 66004237880 in words is "sixty-six billion, four million, two hundred thirty-seven thousand, eight hundred eighty".