666674594946 has 12 divisors (see below), whose sum is σ = 1444461622422. Its totient is φ = 222224864976.

The previous prime is 666674594923. The next prime is 666674594951. The reversal of 666674594946 is 649495476666.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 598495640625 + 68178954321 = 773625^2 + 261111^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18518738731 + ... + 18518738766.

Almost surely, 2^666674594946 is an apocalyptic number.

666674594946 is an abundant number, since it is smaller than the sum of its proper divisors (777787027476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666674594946 is a wasteful number, since it uses less digits than its factorization.

666674594946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37037477505 (or 37037477502 counting only the distinct ones).

The product of its digits is 1410877440, while the sum is 72.

The spelling of 666674594946 in words is "six hundred sixty-six billion, six hundred seventy-four million, five hundred ninety-four thousand, nine hundred forty-six".