64916879 has 4 divisors (see below), whose sum is σ = 67739376. Its totient is φ = 62094384.

The previous prime is 64916851. The next prime is 64916881. The reversal of 64916879 is 97861946.

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

It is a cyclic number.

It is not a de Polignac number, because 64916879 - 2⁸ = 64916623 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 (64916809) 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, 1411214 + ... + 1411259.

It is an arithmetic number, because the mean of its divisors is an integer number (16934844).

Almost surely, 2^64916879 is an apocalyptic number.

64916879 is a deficient number, since it is larger than the sum of its proper divisors (2822497).

64916879 is a wasteful number, since it uses less digits than its factorization.

64916879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2822496.

The product of its digits is 653184, while the sum is 50.

The square root of 64916879 is about 8057.1011536408. The cubic root of 64916879 is about 401.9011146761.

The spelling of 64916879 in words is "sixty-four million, nine hundred sixteen thousand, eight hundred seventy-nine".