165166515 has 48 divisors (see below), whose sum is σ = 293125248. Its totient is φ = 86012928.

The previous prime is 165166493. The next prime is 165166517. The reversal of 165166515 is 515661561.

It is not a de Polignac number, because 165166515 - 2⁶ = 165166451 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165166515.

It is not an unprimeable number, because it can be changed into a prime (165166517) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 449862 + ... + 450228.

It is an arithmetic number, because the mean of its divisors is an integer number (6106776).

Almost surely, 2^165166515 is an apocalyptic number.

165166515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165166515 is a deficient number, since it is larger than the sum of its proper divisors (127958733).

165166515 is a wasteful number, since it uses less digits than its factorization.

165166515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588 (or 585 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 165166515 is about 12851.7125317990. The cubic root of 165166515 is about 548.6650987798.

The spelling of 165166515 in words is "one hundred sixty-five million, one hundred sixty-six thousand, five hundred fifteen".