165166857 has 12 divisors (see below), whose sum is σ = 247410800. Its totient is φ = 110111076.

The previous prime is 165166843. The next prime is 165166873. The reversal of 165166857 is 758661561.

165166857 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 165166857 - 2¹⁸ = 164904713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165166817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 339607 + ... + 340092.

Almost surely, 2^165166857 is an apocalyptic number.

It is an amenable number.

165166857 is a deficient number, since it is larger than the sum of its proper divisors (82243943).

165166857 is an frugal number, since it uses more digits than its factorization.

165166857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679714 (or 679702 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 165166857 is about 12851.7258374119. The cubic root of 165166857 is about 548.6654774751.

The spelling of 165166857 in words is "one hundred sixty-five million, one hundred sixty-six thousand, eight hundred fifty-seven".