676639666 has 32 divisors (see below), whose sum is σ = 1107025920. Its totient is φ = 308998800.

The previous prime is 676639657. The next prime is 676639673. The reversal of 676639666 is 666936676.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360711 + ... + 362581.

It is an arithmetic number, because the mean of its divisors is an integer number (34594560).

Almost surely, 2^676639666 is an apocalyptic number.

676639666 is a deficient number, since it is larger than the sum of its proper divisors (430386254).

676639666 is a wasteful number, since it uses less digits than its factorization.

676639666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230.

The product of its digits is 8817984, while the sum is 55.

The square root of 676639666 is about 26012.2983605832. The cubic root of 676639666 is about 877.9150304428.

The spelling of 676639666 in words is "six hundred seventy-six million, six hundred thirty-nine thousand, six hundred sixty-six".