64878965 has 8 divisors (see below), whose sum is σ = 77967360. Its totient is φ = 51828112.

The previous prime is 64878949. The next prime is 64878967. The reversal of 64878965 is 56987846.

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

It is a cyclic number.

It is not a de Polignac number, because 64878965 - 2⁴ = 64878949 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64878967) 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, 5429 + ... + 12618.

It is an arithmetic number, because the mean of its divisors is an integer number (9745920).

Almost surely, 2^64878965 is an apocalyptic number.

It is an amenable number.

64878965 is a deficient number, since it is larger than the sum of its proper divisors (13088395).

64878965 is a wasteful number, since it uses less digits than its factorization.

64878965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18771.

The product of its digits is 2903040, while the sum is 53.

The square root of 64878965 is about 8054.7479786769. The cubic root of 64878965 is about 401.8228574414.

The spelling of 64878965 in words is "sixty-four million, eight hundred seventy-eight thousand, nine hundred sixty-five".