66794690 has 16 divisors (see below), whose sum is σ = 126558720. Its totient is φ = 25311600.

The previous prime is 66794687. The next prime is 66794701. The reversal of 66794690 is 9649766.

It is a super-2 number, since 2×66794690² = 8923061224392200, which contains 22 as substring.

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, 175586 + ... + 175965.

It is an arithmetic number, because the mean of its divisors is an integer number (7909920).

Almost surely, 2^66794690 is an apocalyptic number.

66794690 is a deficient number, since it is larger than the sum of its proper divisors (59764030).

66794690 is a wasteful number, since it uses less digits than its factorization.

66794690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351577.

The product of its (nonzero) digits is 489888, while the sum is 47.

The square root of 66794690 is about 8172.8018451447. The cubic root of 66794690 is about 405.7395216612.

The spelling of 66794690 in words is "sixty-six million, seven hundred ninety-four thousand, six hundred ninety".