64860665 has 8 divisors (see below), whose sum is σ = 78183168. Its totient is φ = 51654960.

The previous prime is 64860643. The next prime is 64860671. The reversal of 64860665 is 56606846.

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

It is not a de Polignac number, because 64860665 - 2⁸ = 64860409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27971 + ... + 30200.

It is an arithmetic number, because the mean of its divisors is an integer number (9772896).

Almost surely, 2^64860665 is an apocalyptic number.

It is an amenable number.

64860665 is a deficient number, since it is larger than the sum of its proper divisors (13322503).

64860665 is a wasteful number, since it uses less digits than its factorization.

64860665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58399.

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 64860665 is about 8053.6119226096. The cubic root of 64860665 is about 401.7850740100.

The spelling of 64860665 in words is "sixty-four million, eight hundred sixty thousand, six hundred sixty-five".