64878361 has 8 divisors (see below), whose sum is σ = 66306240. Its totient is φ = 63466032.

The previous prime is 64878349. The next prime is 64878367. The reversal of 64878361 is 16387846.

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 64878361 - 2⁵ = 64878329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64878367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4755 + ... + 12343.

It is an arithmetic number, because the mean of its divisors is an integer number (8288280).

Almost surely, 2^64878361 is an apocalyptic number.

It is an amenable number.

64878361 is a deficient number, since it is larger than the sum of its proper divisors (1427879).

64878361 is a wasteful number, since it uses less digits than its factorization.

64878361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7775.

The product of its digits is 193536, while the sum is 43.

The square root of 64878361 is about 8054.7104851757. The cubic root of 64878361 is about 401.8216104951.

The spelling of 64878361 in words is "sixty-four million, eight hundred seventy-eight thousand, three hundred sixty-one".