165566120151 has 16 divisors (see below), whose sum is σ = 224417431008. Its totient is φ = 108546816000.

The previous prime is 165566120123. The next prime is 165566120177. The reversal of 165566120151 is 151021665561.

It is not a de Polignac number, because 165566120151 - 2¹³ = 165566111959 is a prime.

It is a super-4 number, since 4×165566120151⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165566190151) 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, 883951 + ... + 1054751.

It is an arithmetic number, because the mean of its divisors is an integer number (14026089438).

Almost surely, 2^165566120151 is an apocalyptic number.

165566120151 is a deficient number, since it is larger than the sum of its proper divisors (58851310857).

165566120151 is a wasteful number, since it uses less digits than its factorization.

165566120151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176162.

The product of its (nonzero) digits is 54000, while the sum is 39.

The spelling of 165566120151 in words is "one hundred sixty-five billion, five hundred sixty-six million, one hundred twenty thousand, one hundred fifty-one".