665476874 has 8 divisors (see below), whose sum is σ = 999055620. Its totient is φ = 332458336.

The previous prime is 665476873. The next prime is 665476913. The reversal of 665476874 is 478674566.

It can be written as a sum of positive squares in 2 ways, for example, as 665278849 + 198025 = 25793^2 + 445^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (665476873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137069 + ... + 141840.

Almost surely, 2^665476874 is an apocalyptic number.

665476874 is a deficient number, since it is larger than the sum of its proper divisors (333578746).

665476874 is a wasteful number, since it uses less digits than its factorization.

665476874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280104.

The product of its digits is 6773760, while the sum is 53.

The square root of 665476874 is about 25796.8384497015. The cubic root of 665476874 is about 873.0604654525.

The spelling of 665476874 in words is "six hundred sixty-five million, four hundred seventy-six thousand, eight hundred seventy-four".