64646079 has 8 divisors (see below), whose sum is σ = 86241840. Its totient is φ = 43073856.

The previous prime is 64646069. The next prime is 64646093. The reversal of 64646079 is 97064646.

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

It is not a de Polignac number, because 64646079 - 2¹¹ = 64644031 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64646079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64646069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2059 + ... + 11555.

It is an arithmetic number, because the mean of its divisors is an integer number (10780230).

Almost surely, 2^64646079 is an apocalyptic number.

64646079 is a deficient number, since it is larger than the sum of its proper divisors (21595761).

64646079 is a wasteful number, since it uses less digits than its factorization.

64646079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11769.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 64646079 is about 8040.2785399512. The cubic root of 64646079 is about 401.3414938726.

The spelling of 64646079 in words is "sixty-four million, six hundred forty-six thousand, seventy-nine".