669381694 has 16 divisors (see below), whose sum is σ = 1024819200. Its totient is φ = 327842424.

The previous prime is 669381623. The next prime is 669381701. The reversal of 669381694 is 496183966.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3387 + ... + 36745.

It is an arithmetic number, because the mean of its divisors is an integer number (64051200).

Almost surely, 2^669381694 is an apocalyptic number.

669381694 is a deficient number, since it is larger than the sum of its proper divisors (355437506).

669381694 is a wasteful number, since it uses less digits than its factorization.

669381694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33567.

The product of its digits is 1679616, while the sum is 52.

The square root of 669381694 is about 25872.4118319108. The cubic root of 669381694 is about 874.7647559167.

The spelling of 669381694 in words is "six hundred sixty-nine million, three hundred eighty-one thousand, six hundred ninety-four".