665958954 has 16 divisors (see below), whose sum is σ = 1332312192. Its totient is φ = 221920608.

The previous prime is 665958877. The next prime is 665958983. The reversal of 665958954 is 459859566.

It is a junction number, because it is equal to n+sod(n) for n = 665958894 and 665958903.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8422 + ... + 37454.

It is an arithmetic number, because the mean of its divisors is an integer number (83269512).

Almost surely, 2^665958954 is an apocalyptic number.

665958954 is an abundant number, since it is smaller than the sum of its proper divisors (666353238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665958954 is a wasteful number, since it uses less digits than its factorization.

665958954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32861.

The product of its digits is 11664000, while the sum is 57.

The square root of 665958954 is about 25806.1805387779. The cubic root of 665958954 is about 873.2712333068.

The spelling of 665958954 in words is "six hundred sixty-five million, nine hundred fifty-eight thousand, nine hundred fifty-four".