64390067 has 18 divisors (see below), whose sum is σ = 79585452. Its totient is φ = 51933504.

The previous prime is 64390061. The next prime is 64390091. The reversal of 64390067 is 76009346.

It is not a de Polignac number, because 64390067 - 2¹⁸ = 64127923 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64390061) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11888 + ... + 16434.

It is an arithmetic number, because the mean of its divisors is an integer number (4421414).

Almost surely, 2^64390067 is an apocalyptic number.

64390067 is a deficient number, since it is larger than the sum of its proper divisors (15195385).

64390067 is a wasteful number, since it uses less digits than its factorization.

64390067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4595 (or 4571 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 64390067 is about 8024.3421537220. The cubic root of 64390067 is about 400.8109941931.

The spelling of 64390067 in words is "sixty-four million, three hundred ninety thousand, sixty-seven".