66664748 has 24 divisors (see below), whose sum is σ = 118238400. Its totient is φ = 32885888.

The previous prime is 66664733. The next prime is 66664751. The reversal of 66664748 is 84746666.

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, 130718 + ... + 131226.

It is an arithmetic number, because the mean of its divisors is an integer number (4926600).

Almost surely, 2^66664748 is an apocalyptic number.

It is an amenable number.

66664748 is a deficient number, since it is larger than the sum of its proper divisors (51573652).

66664748 is a wasteful number, since it uses less digits than its factorization.

66664748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889 (or 887 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 47.

The square root of 66664748 is about 8164.8483145739. The cubic root of 66664748 is about 405.4762430948.

The spelling of 66664748 in words is "sixty-six million, six hundred sixty-four thousand, seven hundred forty-eight".