64668210 has 32 divisors (see below), whose sum is σ = 163373760. Its totient is φ = 16337088.

The previous prime is 64668209. The next prime is 64668211. The reversal of 64668210 is 1286646.

It is a happy number.

64668210 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (64668209) and next prime (64668211).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64668211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56157 + ... + 57296.

It is an arithmetic number, because the mean of its divisors is an integer number (5105430).

Almost surely, 2^64668210 is an apocalyptic number.

64668210 is an abundant number, since it is smaller than the sum of its proper divisors (98705550).

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

64668210 is a wasteful number, since it uses less digits than its factorization.

64668210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113482.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 64668210 is about 8041.6546804747. The cubic root of 64668210 is about 401.3872871900.

The spelling of 64668210 in words is "sixty-four million, six hundred sixty-eight thousand, two hundred ten".