165320507 has 8 divisors (see below), whose sum is σ = 180714240. Its totient is φ = 149987560.

The previous prime is 165320483. The next prime is 165320543. The reversal of 165320507 is 705023561.

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

It is a cyclic number.

It is not a de Polignac number, because 165320507 - 2⁶ = 165320443 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165320507.

It is not an unprimeable number, because it can be changed into a prime (165320807) 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 7 ways as a sum of consecutive naturals, for example, 9407 + ... + 20472.

It is an arithmetic number, because the mean of its divisors is an integer number (22589280).

Almost surely, 2^165320507 is an apocalyptic number.

165320507 is a deficient number, since it is larger than the sum of its proper divisors (15393733).

165320507 is a wasteful number, since it uses less digits than its factorization.

165320507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30393.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 165320507 is about 12857.7022441803. The cubic root of 165320507 is about 548.8355606751.

The spelling of 165320507 in words is "one hundred sixty-five million, three hundred twenty thousand, five hundred seven".