665846416 has 15 divisors (see below), whose sum is σ = 1290277443. Its totient is φ = 332871600.

The previous prime is 665846383. The next prime is 665846479. The reversal of 665846416 is 614648566.

The square root of 665846416 is 25804.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 99991 + ... + 106441.

Almost surely, 2^665846416 is an apocalyptic number.

665846416 is the 25804-th square number.

It is an amenable number.

665846416 is a deficient number, since it is larger than the sum of its proper divisors (624431027).

665846416 is an frugal number, since it uses more digits than its factorization.

665846416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12910 (or 6453 counting only the distinct ones).

The product of its digits is 829440, while the sum is 46.

The cubic root of 665846416 is about 873.2220402178. Note that the first 3 decimals are identical.

The spelling of 665846416 in words is "six hundred sixty-five million, eight hundred forty-six thousand, four hundred sixteen".