665370842 has 16 divisors (see below), whose sum is σ = 1056400800. Its totient is φ = 313431120.

The previous prime is 665370829. The next prime is 665370857. The reversal of 665370842 is 248073566.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 665370842.

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, 41492 + ... + 55247.

It is an arithmetic number, because the mean of its divisors is an integer number (66025050).

Almost surely, 2^665370842 is an apocalyptic number.

665370842 is a deficient number, since it is larger than the sum of its proper divisors (391029958).

665370842 is a wasteful number, since it uses less digits than its factorization.

665370842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96941.

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 665370842 is about 25794.7832322739. The cubic root of 665370842 is about 873.0140940618.

The spelling of 665370842 in words is "six hundred sixty-five million, three hundred seventy thousand, eight hundred forty-two".