165164685 has 16 divisors (see below), whose sum is σ = 302015616. Its totient is φ = 75503808.

The previous prime is 165164651. The next prime is 165164689. The reversal of 165164685 is 586461561.

165164685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165164685 - 2⁷ = 165164557 is a prime.

It is a super-2 number, since 2×165164685² = 54558746342298450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165164689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 786394 + ... + 786603.

It is an arithmetic number, because the mean of its divisors is an integer number (18875976).

Almost surely, 2^165164685 is an apocalyptic number.

165164685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165164685 is a deficient number, since it is larger than the sum of its proper divisors (136850931).

165164685 is a wasteful number, since it uses less digits than its factorization.

165164685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1573012.

The product of its digits is 172800, while the sum is 42.

The square root of 165164685 is about 12851.6413348646. The cubic root of 165164685 is about 548.6630724190.

The spelling of 165164685 in words is "one hundred sixty-five million, one hundred sixty-four thousand, six hundred eighty-five".