168165507 has 6 divisors (see below), whose sum is σ = 224250628. Its totient is φ = 112095364.

The previous prime is 168165499. The next prime is 168165539. The reversal of 168165507 is 705561861.

It is not a de Polignac number, because 168165507 - 2³ = 168165499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168167507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18718 + ... + 26204.

Almost surely, 2^168165507 is an apocalyptic number.

168165507 is a deficient number, since it is larger than the sum of its proper divisors (56085121).

168165507 is an frugal number, since it uses more digits than its factorization.

168165507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14977 (or 7490 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 168165507 is about 12967.8643962682. The cubic root of 168165507 is about 551.9659747196.

The spelling of 168165507 in words is "one hundred sixty-eight million, one hundred sixty-five thousand, five hundred seven".