165146661 has 16 divisors (see below), whose sum is σ = 245035200. Its totient is φ = 109929744.

The previous prime is 165146629. The next prime is 165146711. The reversal of 165146661 is 166641561.

It is a happy number.

It is not a de Polignac number, because 165146661 - 2⁵ = 165146629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165146621) 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, 14830 + ... + 23456.

It is an arithmetic number, because the mean of its divisors is an integer number (15314700).

Almost surely, 2^165146661 is an apocalyptic number.

It is an amenable number.

165146661 is a deficient number, since it is larger than the sum of its proper divisors (79888539).

165146661 is an equidigital number, since it uses as much as digits as its factorization.

165146661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9345 (or 9339 counting only the distinct ones).

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

The square root of 165146661 is about 12850.9400823442. The cubic root of 165146661 is about 548.6431136266.

The spelling of 165146661 in words is "one hundred sixty-five million, one hundred forty-six thousand, six hundred sixty-one".