660979583 has 8 divisors (see below), whose sum is σ = 722836560. Its totient is φ = 599417280.

The previous prime is 660979511. The next prime is 660979609. The reversal of 660979583 is 385979066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 660979583 - 2²² = 656785279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660979783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68960 + ... + 77957.

It is an arithmetic number, because the mean of its divisors is an integer number (90354570).

Almost surely, 2^660979583 is an apocalyptic number.

660979583 is a deficient number, since it is larger than the sum of its proper divisors (61856977).

660979583 is a wasteful number, since it uses less digits than its factorization.

660979583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147337.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The square root of 660979583 is about 25709.5231966678. The cubic root of 660979583 is about 871.0893049368.

The spelling of 660979583 in words is "six hundred sixty million, nine hundred seventy-nine thousand, five hundred eighty-three".