669808683774 has 24 divisors (see below), whose sum is σ = 1452633019032. Its totient is φ = 223057119600.

The previous prime is 669808683767. The next prime is 669808683779. The reversal of 669808683774 is 477386808966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669808683779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17684029 + ... + 17721864.

It is an arithmetic number, because the mean of its divisors is an integer number (60526375793).

Almost surely, 2^669808683774 is an apocalyptic number.

669808683774 is an abundant number, since it is smaller than the sum of its proper divisors (782824335258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669808683774 is a wasteful number, since it uses less digits than its factorization.

669808683774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35406952 (or 35406949 counting only the distinct ones).

The product of its (nonzero) digits is 585252864, while the sum is 72.

The spelling of 669808683774 in words is "six hundred sixty-nine billion, eight hundred eight million, six hundred eighty-three thousand, seven hundred seventy-four".