64599980 has 24 divisors (see below), whose sum is σ = 135898560. Its totient is φ = 25794560.

The previous prime is 64599973. The next prime is 64600007. The reversal of 64599980 is 8999546.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10301 + ... + 15339.

It is an arithmetic number, because the mean of its divisors is an integer number (5662440).

Almost surely, 2^64599980 is an apocalyptic number.

It is an amenable number.

64599980 is an abundant number, since it is smaller than the sum of its proper divisors (71298580).

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

64599980 is a wasteful number, since it uses less digits than its factorization.

64599980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5689 (or 5687 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 50.

The square root of 64599980 is about 8037.4112747824. The cubic root of 64599980 is about 401.2460725605.

The spelling of 64599980 in words is "sixty-four million, five hundred ninety-nine thousand, nine hundred eighty".