64664022 has 16 divisors (see below), whose sum is σ = 136935792. Its totient is φ = 20286720.

The previous prime is 64664021. The next prime is 64664029. The reversal of 64664022 is 22046646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64664021) 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, 316879 + ... + 317082.

It is an arithmetic number, because the mean of its divisors is an integer number (8558487).

Almost surely, 2^64664022 is an apocalyptic number.

64664022 is an abundant number, since it is smaller than the sum of its proper divisors (72271770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64664022 is a wasteful number, since it uses less digits than its factorization.

64664022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633983.

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 64664022 is about 8041.3942820882. The cubic root of 64664022 is about 401.3786222099.

The spelling of 64664022 in words is "sixty-four million, six hundred sixty-four thousand, twenty-two".