660673056 has 24 divisors (see below), whose sum is σ = 1734267024. Its totient is φ = 220224320.

The previous prime is 660673049. The next prime is 660673087. The reversal of 660673056 is 650376066.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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, 3440910 + ... + 3441101.

It is an arithmetic number, because the mean of its divisors is an integer number (72261126).

Almost surely, 2^660673056 is an apocalyptic number.

It is an amenable number.

660673056 is an abundant number, since it is smaller than the sum of its proper divisors (1073593968).

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

660673056 is a wasteful number, since it uses less digits than its factorization.

660673056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6882024 (or 6882016 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 39.

The square root of 660673056 is about 25703.5611540502. The cubic root of 660673056 is about 870.9546292301.

The spelling of 660673056 in words is "six hundred sixty million, six hundred seventy-three thousand, fifty-six".