669416655 has 16 divisors (see below), whose sum is σ = 1089221760. Its totient is φ = 350970528.

The previous prime is 669416653. The next prime is 669416711. The reversal of 669416655 is 556614966.

It is not a de Polignac number, because 669416655 - 2¹ = 669416653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669416653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377317 + ... + 379086.

It is an arithmetic number, because the mean of its divisors is an integer number (68076360).

Almost surely, 2^669416655 is an apocalyptic number.

669416655 is a deficient number, since it is larger than the sum of its proper divisors (419805105).

669416655 is a wasteful number, since it uses less digits than its factorization.

669416655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756470.

The product of its digits is 1166400, while the sum is 48.

The square root of 669416655 is about 25873.0874655500. The cubic root of 669416655 is about 874.7799849549.

The spelling of 669416655 in words is "six hundred sixty-nine million, four hundred sixteen thousand, six hundred fifty-five".