64979965 has 8 divisors (see below), whose sum is σ = 78075648. Its totient is φ = 51917520.

The previous prime is 64979963. The next prime is 64979969. The reversal of 64979965 is 56997946.

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

It is not a de Polignac number, because 64979965 - 2¹ = 64979963 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 (64979963) 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, 3781 + ... + 12010.

It is an arithmetic number, because the mean of its divisors is an integer number (9759456).

Almost surely, 2^64979965 is an apocalyptic number.

It is an amenable number.

64979965 is a deficient number, since it is larger than the sum of its proper divisors (13095683).

64979965 is a wasteful number, since it uses less digits than its factorization.

64979965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16619.

The product of its digits is 3674160, while the sum is 55.

The square root of 64979965 is about 8061.0151345845. The cubic root of 64979965 is about 402.0312612340.

The spelling of 64979965 in words is "sixty-four million, nine hundred seventy-nine thousand, nine hundred sixty-five".