665516366 has 16 divisors (see below), whose sum is σ = 1008662928. Its totient is φ = 329313600.

The previous prime is 665516351. The next prime is 665516377. The reversal of 665516366 is 663615566.

It is a congruent number.

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, 72026 + ... + 80738.

It is an arithmetic number, because the mean of its divisors is an integer number (63041433).

Almost surely, 2^665516366 is an apocalyptic number.

665516366 is a deficient number, since it is larger than the sum of its proper divisors (343146562).

665516366 is a wasteful number, since it uses less digits than its factorization.

665516366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9107.

The product of its digits is 583200, while the sum is 44.

The square root of 665516366 is about 25797.6038809809. The cubic root of 665516366 is about 873.0777353849.

The spelling of 665516366 in words is "six hundred sixty-five million, five hundred sixteen thousand, three hundred sixty-six".