66662426666 has 24 divisors (see below), whose sum is σ = 110749427712. Its totient is φ = 30069782600.

The previous prime is 66662426651. The next prime is 66662426681.

66662426666 is nontrivially palindromic in base 10.

66662426666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66662426651) and next prime (66662426681).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1019690 + ... + 1083093.

It is an arithmetic number, because the mean of its divisors is an integer number (4614559488).

Almost surely, 2^66662426666 is an apocalyptic number.

66662426666 is a deficient number, since it is larger than the sum of its proper divisors (44087001046).

66662426666 is a wasteful number, since it uses less digits than its factorization.

66662426666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102938 (or 2102927 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 56.

The spelling of 66662426666 in words is "sixty-six billion, six hundred sixty-two million, four hundred twenty-six thousand, six hundred sixty-six".