165260611 has 4 divisors (see below), whose sum is σ = 169727152. Its totient is φ = 160794072.

The previous prime is 165260581. The next prime is 165260633. The reversal of 165260611 is 116062561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165260611 - 2⁷ = 165260483 is a prime.

It is a super-2 number, since 2×165260611² = 54622139096186642, which contains 22 as substring.

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 165260611.

It is not an unprimeable number, because it can be changed into a prime (165260671) 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, 2233215 + ... + 2233288.

It is an arithmetic number, because the mean of its divisors is an integer number (42431788).

Almost surely, 2^165260611 is an apocalyptic number.

165260611 is a deficient number, since it is larger than the sum of its proper divisors (4466541).

165260611 is an equidigital number, since it uses as much as digits as its factorization.

165260611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4466540.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 165260611 is about 12855.3728456237. The cubic root of 165260611 is about 548.7692712068.

The spelling of 165260611 in words is "one hundred sixty-five million, two hundred sixty thousand, six hundred eleven".