66888044428 has 12 divisors (see below), whose sum is σ = 117401421592. Its totient is φ = 33344781120.

The previous prime is 66888044417. The next prime is 66888044441. The reversal of 66888044428 is 82444088866.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24808758 + ... + 24811453.

Almost surely, 2^66888044428 is an apocalyptic number.

It is an amenable number.

66888044428 is a deficient number, since it is larger than the sum of its proper divisors (50513377164).

66888044428 is a wasteful number, since it uses less digits than its factorization.

66888044428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49620552 (or 49620550 counting only the distinct ones).

The product of its (nonzero) digits is 18874368, while the sum is 58.

The spelling of 66888044428 in words is "sixty-six billion, eight hundred eighty-eight million, forty-four thousand, four hundred twenty-eight".