660770408 has 16 divisors (see below), whose sum is σ = 1244503680. Its totient is φ = 328902768.

The previous prime is 660770393. The next prime is 660770431. The reversal of 660770408 is 804077066.

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, 183410 + ... + 186977.

It is an arithmetic number, because the mean of its divisors is an integer number (77781480).

Almost surely, 2^660770408 is an apocalyptic number.

It is an amenable number.

660770408 is a deficient number, since it is larger than the sum of its proper divisors (583733272).

660770408 is a wasteful number, since it uses less digits than its factorization.

660770408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370616 (or 370612 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 660770408 is about 25705.4548296660. The cubic root of 660770408 is about 870.9974063193.

The spelling of 660770408 in words is "six hundred sixty million, seven hundred seventy thousand, four hundred eight".