669006664 has 32 divisors (see below), whose sum is σ = 1277978400. Its totient is φ = 328233600.

The previous prime is 669006647. The next prime is 669006677. The reversal of 669006664 is 466600966.

It is a self number, because there is not a number n which added to its sum of digits gives 669006664.

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, 370564 + ... + 372364.

It is an arithmetic number, because the mean of its divisors is an integer number (39936825).

Almost surely, 2^669006664 is an apocalyptic number.

It is an amenable number.

669006664 is a deficient number, since it is larger than the sum of its proper divisors (608971736).

669006664 is a wasteful number, since it uses less digits than its factorization.

669006664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2653 (or 2649 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 43.

The square root of 669006664 is about 25865.1631349968. The cubic root of 669006664 is about 874.6013592001.

The spelling of 669006664 in words is "six hundred sixty-nine million, six thousand, six hundred sixty-four".