165136806 has 40 divisors (see below), whose sum is σ = 370782720. Its totient is φ = 54933552.

The previous prime is 165136801. The next prime is 165136819. The reversal of 165136806 is 608631561.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165136801) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 128475 + ... + 129753.

It is an arithmetic number, because the mean of its divisors is an integer number (9269568).

Almost surely, 2^165136806 is an apocalyptic number.

165136806 is an abundant number, since it is smaller than the sum of its proper divisors (205645914).

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

165136806 is a wasteful number, since it uses less digits than its factorization.

165136806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090 (or 2081 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 165136806 is about 12850.5566416401. The cubic root of 165136806 is about 548.6322001243.

It can be divided in two parts, 1651 and 36806, that multiplied together give a palindrome (60766706).

The spelling of 165136806 in words is "one hundred sixty-five million, one hundred thirty-six thousand, eight hundred six".