66664882 has 16 divisors (see below), whose sum is σ = 106747200. Its totient is φ = 31132080.

The previous prime is 66664859. The next prime is 66664883. The reversal of 66664882 is 28846666.

It is not an unprimeable number, because it can be changed into a prime (66664883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9657 + ... + 15052.

It is an arithmetic number, because the mean of its divisors is an integer number (6671700).

Almost surely, 2^66664882 is an apocalyptic number.

66664882 is a deficient number, since it is larger than the sum of its proper divisors (40082318).

66664882 is a wasteful number, since it uses less digits than its factorization.

66664882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24801.

The product of its digits is 663552, while the sum is 46.

The square root of 66664882 is about 8164.8565204785. The cubic root of 66664882 is about 405.4765147716.

The spelling of 66664882 in words is "sixty-six million, six hundred sixty-four thousand, eight hundred eighty-two".