165965655 has 8 divisors (see below), whose sum is σ = 265545072. Its totient is φ = 88515008.

The previous prime is 165965629. The next prime is 165965659. The reversal of 165965655 is 556569561.

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 165965655 - 2⁵ = 165965623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165965659) 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, 5532174 + ... + 5532203.

It is an arithmetic number, because the mean of its divisors is an integer number (33193134).

Almost surely, 2^165965655 is an apocalyptic number.

165965655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165965655 is a deficient number, since it is larger than the sum of its proper divisors (99579417).

165965655 is a wasteful number, since it uses less digits than its factorization.

165965655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11064385.

The product of its digits is 1215000, while the sum is 48.

The square root of 165965655 is about 12882.7658132871. The cubic root of 165965655 is about 549.5485606900.

The spelling of 165965655 in words is "one hundred sixty-five million, nine hundred sixty-five thousand, six hundred fifty-five".