669846956 has 12 divisors (see below), whose sum is σ = 1172865960. Its totient is φ = 334742400.

The previous prime is 669846953. The next prime is 669846979. The reversal of 669846956 is 659648966.

It is a junction number, because it is equal to n+sod(n) for n = 669846895 and 669846904.

It is not an unprimeable number, because it can be changed into a prime (669846953) 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 3 ways as a sum of consecutive naturals, for example, 36770 + ... + 51881.

It is an arithmetic number, because the mean of its divisors is an integer number (97738830).

Almost surely, 2^669846956 is an apocalyptic number.

It is an amenable number.

669846956 is a deficient number, since it is larger than the sum of its proper divisors (503019004).

669846956 is a wasteful number, since it uses less digits than its factorization.

669846956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90544 (or 90542 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 59.

The square root of 669846956 is about 25881.4017394731. The cubic root of 669846956 is about 874.9673809881.

The spelling of 669846956 in words is "six hundred sixty-nine million, eight hundred forty-six thousand, nine hundred fifty-six".