165865479 has 8 divisors (see below), whose sum is σ = 238165872. Its totient is φ = 102071040.

The previous prime is 165865463. The next prime is 165865499. The reversal of 165865479 is 974568561.

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

It is not a de Polignac number, because 165865479 - 2⁴ = 165865463 is a prime.

It is a super-2 number, since 2×165865479² = 55022714247798882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165865499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2126442 + ... + 2126519.

It is an arithmetic number, because the mean of its divisors is an integer number (29770734).

Almost surely, 2^165865479 is an apocalyptic number.

165865479 is a deficient number, since it is larger than the sum of its proper divisors (72300393).

165865479 is a wasteful number, since it uses less digits than its factorization.

165865479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4252977.

The product of its digits is 1814400, while the sum is 51.

The square root of 165865479 is about 12878.8772414368. The cubic root of 165865479 is about 549.4379702256.

The spelling of 165865479 in words is "one hundred sixty-five million, eight hundred sixty-five thousand, four hundred seventy-nine".