165570007 has 4 divisors (see below), whose sum is σ = 167209416. Its totient is φ = 163930600.

The previous prime is 165569959. The next prime is 165570023. The reversal of 165570007 is 700075561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 700075561 = 43 ⋅16280827.

It is a cyclic number.

It is not a de Polignac number, because 165570007 - 2¹⁹ = 165045719 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165570607) 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, 819553 + ... + 819754.

It is an arithmetic number, because the mean of its divisors is an integer number (41802354).

Almost surely, 2^165570007 is an apocalyptic number.

165570007 is a deficient number, since it is larger than the sum of its proper divisors (1639409).

165570007 is a wasteful number, since it uses less digits than its factorization.

165570007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639408.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 165570007 is about 12867.4009419152. The cubic root of 165570007 is about 549.1115208809. Note that the first 3 decimals are identical.

The spelling of 165570007 in words is "one hundred sixty-five million, five hundred seventy thousand, seven".