165545506 has 8 divisors (see below), whose sum is σ = 283792320. Its totient is φ = 70948068.

The previous prime is 165545503. The next prime is 165545509. The reversal of 165545506 is 605545561.

It is an interprime number because it is at equal distance from previous prime (165545503) and next prime (165545509).

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

It is not an unprimeable number, because it can be changed into a prime (165545503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5912326 + ... + 5912353.

It is an arithmetic number, because the mean of its divisors is an integer number (35474040).

Almost surely, 2^165545506 is an apocalyptic number.

165545506 is a deficient number, since it is larger than the sum of its proper divisors (118246814).

165545506 is a wasteful number, since it uses less digits than its factorization.

165545506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11824688.

The product of its (nonzero) digits is 90000, while the sum is 37.

The square root of 165545506 is about 12866.4488496244. The cubic root of 165545506 is about 549.0844337586.

The spelling of 165545506 in words is "one hundred sixty-five million, five hundred forty-five thousand, five hundred six".