665472159 has 16 divisors (see below), whose sum is σ = 1075511040. Its totient is φ = 403316280.

The previous prime is 665472149. The next prime is 665472163. The reversal of 665472159 is 951274566.

It is not a de Polignac number, because 665472159 - 2¹¹ = 665470111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665472139) 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 15 ways as a sum of consecutive naturals, for example, 1120027 + ... + 1120620.

It is an arithmetic number, because the mean of its divisors is an integer number (67219440).

Almost surely, 2^665472159 is an apocalyptic number.

665472159 is a deficient number, since it is larger than the sum of its proper divisors (410038881).

665472159 is a wasteful number, since it uses less digits than its factorization.

665472159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240667 (or 2240661 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 665472159 is about 25796.7470623720. The cubic root of 665472159 is about 873.0584035277.

The spelling of 665472159 in words is "six hundred sixty-five million, four hundred seventy-two thousand, one hundred fifty-nine".