64599879 has 4 divisors (see below), whose sum is σ = 86133176. Its totient is φ = 43066584.

The previous prime is 64599863. The next prime is 64599883. The reversal of 64599879 is 97899546.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64599879 - 2⁴ = 64599863 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 (64599839) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10766644 + ... + 10766649.

It is an arithmetic number, because the mean of its divisors is an integer number (21533294).

Almost surely, 2^64599879 is an apocalyptic number.

64599879 is a deficient number, since it is larger than the sum of its proper divisors (21533297).

64599879 is a wasteful number, since it uses less digits than its factorization.

64599879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21533296.

The product of its digits is 4898880, while the sum is 57.

The square root of 64599879 is about 8037.4049916624. The cubic root of 64599879 is about 401.2458634486.

The spelling of 64599879 in words is "sixty-four million, five hundred ninety-nine thousand, eight hundred seventy-nine".