669693886 has 8 divisors (see below), whose sum is σ = 1063631520. Its totient is φ = 315150048.

The previous prime is 669693851. The next prime is 669693887. The reversal of 669693886 is 688396966.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669693887) 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, 9848406 + ... + 9848473.

It is an arithmetic number, because the mean of its divisors is an integer number (132953940).

Almost surely, 2^669693886 is an apocalyptic number.

669693886 is a deficient number, since it is larger than the sum of its proper divisors (393937634).

669693886 is a wasteful number, since it uses less digits than its factorization.

669693886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19696898.

The product of its digits is 20155392, while the sum is 61.

The square root of 669693886 is about 25878.4444277472. Note that the first 4 decimals coincide. The cubic root of 669693886 is about 874.9007282207.

The spelling of 669693886 in words is "six hundred sixty-nine million, six hundred ninety-three thousand, eight hundred eighty-six".