164866895 has 24 divisors (see below), whose sum is σ = 210220560. Its totient is φ = 124104960.

The previous prime is 164866883. The next prime is 164866903. The reversal of 164866895 is 598668461.

It is not a de Polignac number, because 164866895 - 2⁶ = 164866831 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 434816 + ... + 435194.

It is an arithmetic number, because the mean of its divisors is an integer number (8759190).

Almost surely, 2^164866895 is an apocalyptic number.

164866895 is a deficient number, since it is larger than the sum of its proper divisors (45353665).

164866895 is a wasteful number, since it uses less digits than its factorization.

164866895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663 (or 644 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 53.

The square root of 164866895 is about 12840.0504282499. The cubic root of 164866895 is about 548.3331296725. Note that the first 3 decimals are identical.

The spelling of 164866895 in words is "one hundred sixty-four million, eight hundred sixty-six thousand, eight hundred ninety-five".