665324255541 has 16 divisors (see below), whose sum is σ = 975131739648. Its totient is φ = 400148751600.

The previous prime is 665324255527. The next prime is 665324255587. The reversal of 665324255541 is 145552423566.

It is not a de Polignac number, because 665324255541 - 2⁵ = 665324255509 is a prime.

It is a super-2 number, since 2×665324255541² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665324255041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76947361 + ... + 76956006.

It is an arithmetic number, because the mean of its divisors is an integer number (60945733728).

Almost surely, 2^665324255541 is an apocalyptic number.

It is an amenable number.

665324255541 is a deficient number, since it is larger than the sum of its proper divisors (309807484107).

665324255541 is a wasteful number, since it uses less digits than its factorization.

665324255541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153903512.

The product of its digits is 4320000, while the sum is 48.

The spelling of 665324255541 in words is "six hundred sixty-five billion, three hundred twenty-four million, two hundred fifty-five thousand, five hundred forty-one".