669840676 has 24 divisors (see below), whose sum is σ = 1188180000. Its totient is φ = 330391872.

The previous prime is 669840667. The next prime is 669840679. The reversal of 669840676 is 676048966.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (669840679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85575 + ... + 93073.

It is an arithmetic number, because the mean of its divisors is an integer number (49507500).

Almost surely, 2^669840676 is an apocalyptic number.

It is an amenable number.

669840676 is a deficient number, since it is larger than the sum of its proper divisors (518339324).

669840676 is a wasteful number, since it uses less digits than its factorization.

669840676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7803 (or 7801 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 52.

The square root of 669840676 is about 25881.2804165482. The cubic root of 669840676 is about 874.9646466260.

It can be divided in two parts, 6698 and 40676, that added together give a palindrome (47374).

The spelling of 669840676 in words is "six hundred sixty-nine million, eight hundred forty thousand, six hundred seventy-six".