660559996 has 12 divisors (see below), whose sum is σ = 1180575648. Its totient is φ = 323252672.

The previous prime is 660559981. The next prime is 660560029. The reversal of 660559996 is 699955066.

It is a congruent number.

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, 1756621 + ... + 1756996.

It is an arithmetic number, because the mean of its divisors is an integer number (98381304).

Almost surely, 2^660559996 is an apocalyptic number.

It is an amenable number.

660559996 is a deficient number, since it is larger than the sum of its proper divisors (520015652).

660559996 is a wasteful number, since it uses less digits than its factorization.

660559996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3513668 (or 3513666 counting only the distinct ones).

The product of its (nonzero) digits is 3936600, while the sum is 55.

The square root of 660559996 is about 25701.3617538060. The cubic root of 660559996 is about 870.9049446713.

The spelling of 660559996 in words is "six hundred sixty million, five hundred fifty-nine thousand, nine hundred ninety-six".