669344669 has 8 divisors (see below), whose sum is σ = 765208128. Its totient is φ = 573541920.

The previous prime is 669344647. The next prime is 669344681. The reversal of 669344669 is 966443966.

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

It is a de Polignac number, because none of the positive numbers 2^k-669344669 is a prime.

It is a super-2 number, since 2×669344669² = 896044571837439122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 669344669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669344629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11609 + ... + 38385.

It is an arithmetic number, because the mean of its divisors is an integer number (95651016).

Almost surely, 2^669344669 is an apocalyptic number.

It is an amenable number.

669344669 is a deficient number, since it is larger than the sum of its proper divisors (95863459).

669344669 is a wasteful number, since it uses less digits than its factorization.

669344669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30355.

The product of its digits is 5038848, while the sum is 53.

The square root of 669344669 is about 25871.6962915074. The cubic root of 669344669 is about 874.7486272203.

The spelling of 669344669 in words is "six hundred sixty-nine million, three hundred forty-four thousand, six hundred sixty-nine".