165613507 has 8 divisors (see below), whose sum is σ = 175791600. Its totient is φ = 155483904.

The previous prime is 165613463. The next prime is 165613523. The reversal of 165613507 is 705316561.

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

It is not a de Polignac number, because 165613507 - 2¹⁵ = 165580739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165613537) 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, 4957 + ... + 18862.

It is an arithmetic number, because the mean of its divisors is an integer number (21973950).

Almost surely, 2^165613507 is an apocalyptic number.

165613507 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

165613507 is a deficient number, since it is larger than the sum of its proper divisors (10178093).

165613507 is a wasteful number, since it uses less digits than its factorization.

165613507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24245.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 165613507 is about 12869.0911489507. The cubic root of 165613507 is about 549.1596057968.

The spelling of 165613507 in words is "one hundred sixty-five million, six hundred thirteen thousand, five hundred seven".