665544234 has 16 divisors (see below), whose sum is σ = 1367064288. Its totient is φ = 215852112.

The previous prime is 665544227. The next prime is 665544281. The reversal of 665544234 is 432445566.

It is a junction number, because it is equal to n+sod(n) for n = 665544192 and 665544201.

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, 1498752 + ... + 1499195.

It is an arithmetic number, because the mean of its divisors is an integer number (85441518).

Almost surely, 2^665544234 is an apocalyptic number.

665544234 is an abundant number, since it is smaller than the sum of its proper divisors (701520054).

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

665544234 is a wasteful number, since it uses less digits than its factorization.

665544234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2997989.

The product of its digits is 345600, while the sum is 39.

The square root of 665544234 is about 25798.1440030092. The cubic root of 665544234 is about 873.0899217072.

The spelling of 665544234 in words is "six hundred sixty-five million, five hundred forty-four thousand, two hundred thirty-four".