164686057 has 4 divisors (see below), whose sum is σ = 165375360. Its totient is φ = 163996756.

The previous prime is 164686019. The next prime is 164686061. The reversal of 164686057 is 750686461.

It is a happy number.

164686057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 164686057 - 2¹⁹ = 164161769 is a prime.

It is a super-3 number, since 3×164686057³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164686097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344293 + ... + 344770.

It is an arithmetic number, because the mean of its divisors is an integer number (41343840).

Almost surely, 2^164686057 is an apocalyptic number.

It is an amenable number.

164686057 is a deficient number, since it is larger than the sum of its proper divisors (689303).

164686057 is an equidigital number, since it uses as much as digits as its factorization.

164686057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689302.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 164686057 is about 12833.0065456229. The cubic root of 164686057 is about 548.1325724417.

The spelling of 164686057 in words is "one hundred sixty-four million, six hundred eighty-six thousand, fifty-seven".