165606051 has 32 divisors (see below), whose sum is σ = 244758528. Its totient is φ = 98962560.

The previous prime is 165606047. The next prime is 165606059. The reversal of 165606051 is 150606561.

It is not a de Polignac number, because 165606051 - 2² = 165606047 is a prime.

It is a super-3 number, since 3×165606051³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (165606059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 305841 + ... + 306381.

It is an arithmetic number, because the mean of its divisors is an integer number (7648704).

Almost surely, 2^165606051 is an apocalyptic number.

165606051 is a deficient number, since it is larger than the sum of its proper divisors (79152477).

165606051 is a wasteful number, since it uses less digits than its factorization.

165606051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 165606051 is about 12868.8014593434. The cubic root of 165606051 is about 549.1513645296.

The spelling of 165606051 in words is "one hundred sixty-five million, six hundred six thousand, fifty-one".