165606607 has 4 divisors (see below), whose sum is σ = 165685680. Its totient is φ = 165527536.

The previous prime is 165606599. The next prime is 165606653. The reversal of 165606607 is 706606561.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165606607 - 2³ = 165606599 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 (165606697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36307 + ... + 40612.

It is an arithmetic number, because the mean of its divisors is an integer number (41421420).

Almost surely, 2^165606607 is an apocalyptic number.

165606607 is a deficient number, since it is larger than the sum of its proper divisors (79073).

165606607 is an equidigital number, since it uses as much as digits as its factorization.

165606607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79072.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 165606607 is about 12868.8230619587. The cubic root of 165606607 is about 549.1519790961.

The spelling of 165606607 in words is "one hundred sixty-five million, six hundred six thousand, six hundred seven".