669777712 has 20 divisors (see below), whose sum is σ = 1298115576. Its totient is φ = 334780160.

The previous prime is 669777697. The next prime is 669777749. The reversal of 669777712 is 217777966.

It is a self number, because there is not a number n which added to its sum of digits gives 669777712.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71103 + ... + 79969.

Almost surely, 2^669777712 is an apocalyptic number.

It is an amenable number.

669777712 is a deficient number, since it is larger than the sum of its proper divisors (628337864).

669777712 is a wasteful number, since it uses less digits than its factorization.

669777712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13596 (or 13590 counting only the distinct ones).

The product of its digits is 1555848, while the sum is 52.

The square root of 669777712 is about 25880.0639875561. The cubic root of 669777712 is about 874.9372306537.

The spelling of 669777712 in words is "six hundred sixty-nine million, seven hundred seventy-seven thousand, seven hundred twelve".