669654788 has 24 divisors (see below), whose sum is σ = 1302557760. Its totient is φ = 298644320.

The previous prime is 669654773. The next prime is 669654847. The reversal of 669654788 is 887456966.

669654788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 141248 + ... + 145911.

It is an arithmetic number, because the mean of its divisors is an integer number (54273240).

Almost surely, 2^669654788 is an apocalyptic number.

It is an amenable number.

669654788 is a deficient number, since it is larger than the sum of its proper divisors (632902972).

669654788 is a wasteful number, since it uses less digits than its factorization.

669654788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287227 (or 287225 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 59.

The square root of 669654788 is about 25877.6890003725. The cubic root of 669654788 is about 874.8837017677.

The spelling of 669654788 in words is "six hundred sixty-nine million, six hundred fifty-four thousand, seven hundred eighty-eight".