666984476 has 12 divisors (see below), whose sum is σ = 1173149208. Its totient is φ = 331798992.

The previous prime is 666984469. The next prime is 666984491. The reversal of 666984476 is 674489666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422426 + ... + 424001.

It is an arithmetic number, because the mean of its divisors is an integer number (97762434).

Almost surely, 2^666984476 is an apocalyptic number.

It is an amenable number.

666984476 is a deficient number, since it is larger than the sum of its proper divisors (506164732).

666984476 is a wasteful number, since it uses less digits than its factorization.

666984476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846628 (or 846626 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 56.

The square root of 666984476 is about 25826.0425927009. The cubic root of 666984476 is about 873.7192586962.

The spelling of 666984476 in words is "six hundred sixty-six million, nine hundred eighty-four thousand, four hundred seventy-six".