666864476 has 12 divisors (see below), whose sum is σ = 1167349008. Its totient is φ = 333336192.

The previous prime is 666864463. The next prime is 666864509. The reversal of 666864476 is 674468666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7061 + ... + 37196.

It is an arithmetic number, because the mean of its divisors is an integer number (97279084).

Almost surely, 2^666864476 is an apocalyptic number.

It is an amenable number.

666864476 is a deficient number, since it is larger than the sum of its proper divisors (500484532).

666864476 is a wasteful number, since it uses less digits than its factorization.

666864476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48028 (or 48026 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 53.

The square root of 666864476 is about 25823.7192518816. The cubic root of 666864476 is about 873.6668573769. Note that the first 3 decimals are identical.

The spelling of 666864476 in words is "six hundred sixty-six million, eight hundred sixty-four thousand, four hundred seventy-six".