165460861 has 4 divisors (see below), whose sum is σ = 169308832. Its totient is φ = 161612892.

The previous prime is 165460843. The next prime is 165460901. The reversal of 165460861 is 168064561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 165460861 - 2⁵ = 165460829 is a prime.

It is a super-2 number, since 2×165460861² = 54754593045722642, 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 165460861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165460661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1923921 + ... + 1924006.

It is an arithmetic number, because the mean of its divisors is an integer number (42327208).

Almost surely, 2^165460861 is an apocalyptic number.

It is an amenable number.

165460861 is a deficient number, since it is larger than the sum of its proper divisors (3847971).

165460861 is an equidigital number, since it uses as much as digits as its factorization.

165460861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3847970.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 165460861 is about 12863.1590598888. The cubic root of 165460861 is about 548.9908337637.

The spelling of 165460861 in words is "one hundred sixty-five million, four hundred sixty thousand, eight hundred sixty-one".