165166157 has 8 divisors (see below), whose sum is σ = 178124184. Its totient is φ = 152244288.

The previous prime is 165166153. The next prime is 165166181. The reversal of 165166157 is 751661561.

165166157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9066121 + 156100036 = 3011^2 + 12494^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165166157 - 2² = 165166153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165166157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165166153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 863 + ... + 18195.

It is an arithmetic number, because the mean of its divisors is an integer number (22265523).

Almost surely, 2^165166157 is an apocalyptic number.

It is an amenable number.

165166157 is a deficient number, since it is larger than the sum of its proper divisors (12958027).

165166157 is a wasteful number, since it uses less digits than its factorization.

165166157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18079.

The product of its digits is 37800, while the sum is 38.

The square root of 165166157 is about 12851.6986036866. The cubic root of 165166157 is about 548.6647023672.

The spelling of 165166157 in words is "one hundred sixty-five million, one hundred sixty-six thousand, one hundred fifty-seven".