164644668 has 36 divisors (see below), whose sum is σ = 416613288. Its totient is φ = 54825120.

The previous prime is 164644657. The next prime is 164644679. The reversal of 164644668 is 866446461.

It is an interprime number because it is at equal distance from previous prime (164644657) and next prime (164644679).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 47763 + ... + 51093.

Almost surely, 2^164644668 is an apocalyptic number.

164644668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

164644668 is an abundant number, since it is smaller than the sum of its proper divisors (251968620).

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

164644668 is a wasteful number, since it uses less digits than its factorization.

164644668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4714 (or 4709 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The square root of 164644668 is about 12831.3938447855. The cubic root of 164644668 is about 548.0866495906.

The spelling of 164644668 in words is "one hundred sixty-four million, six hundred forty-four thousand, six hundred sixty-eight".