165156663 has 16 divisors (see below), whose sum is σ = 252866816. Its totient is φ = 93925440.

The previous prime is 165156661. The next prime is 165156713. The reversal of 165156663 is 366651561.

It is not a de Polignac number, because 165156663 - 2¹ = 165156661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165156661) 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, 14206 + ... + 23067.

It is an arithmetic number, because the mean of its divisors is an integer number (15804176).

Almost surely, 2^165156663 is an apocalyptic number.

165156663 is a deficient number, since it is larger than the sum of its proper divisors (87710153).

165156663 is a wasteful number, since it uses less digits than its factorization.

165156663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37494.

The product of its digits is 97200, while the sum is 39.

The square root of 165156663 is about 12851.3292308617. The cubic root of 165156663 is about 548.6541894740.

The spelling of 165156663 in words is "one hundred sixty-five million, one hundred fifty-six thousand, six hundred sixty-three".