669947912 has 32 divisors (see below), whose sum is σ = 1289402400. Its totient is φ = 326156544.

The previous prime is 669947897. The next prime is 669947921. The reversal of 669947912 is 219749966.

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, 113039 + ... + 118817.

It is an arithmetic number, because the mean of its divisors is an integer number (40293825).

Almost surely, 2^669947912 is an apocalyptic number.

It is an amenable number.

669947912 is a deficient number, since it is larger than the sum of its proper divisors (619454488).

669947912 is a wasteful number, since it uses less digits than its factorization.

669947912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6165 (or 6161 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 53.

The square root of 669947912 is about 25883.3520240327. The cubic root of 669947912 is about 875.0113356899.

The spelling of 669947912 in words is "six hundred sixty-nine million, nine hundred forty-seven thousand, nine hundred twelve".