669312776 has 32 divisors (see below), whose sum is σ = 1373971680. Its totient is φ = 303139200.

The previous prime is 669312769. The next prime is 669312793. The reversal of 669312776 is 677213966.

It is a happy number.

669312776 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 669312776.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11195 + ... + 38261.

It is an arithmetic number, because the mean of its divisors is an integer number (42936615).

Almost surely, 2^669312776 is an apocalyptic number.

It is an amenable number.

669312776 is an abundant number, since it is smaller than the sum of its proper divisors (704658904).

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

669312776 is a wasteful number, since it uses less digits than its factorization.

669312776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27365 (or 27361 counting only the distinct ones).

The product of its digits is 571536, while the sum is 47.

The square root of 669312776 is about 25871.0799156123. The cubic root of 669312776 is about 874.7347336304.

The spelling of 669312776 in words is "six hundred sixty-nine million, three hundred twelve thousand, seven hundred seventy-six".