669615458756 has 12 divisors (see below), whose sum is σ = 1171960991292. Its totient is φ = 334769461248.

The previous prime is 669615458741. The next prime is 669615458779. The reversal of 669615458756 is 657854516966.

It can be written as a sum of positive squares in 2 ways, for example, as 490652617156 + 178962841600 = 700466^2 + 423040^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9527645 + ... + 9597668.

It is an arithmetic number, because the mean of its divisors is an integer number (97663415941).

Almost surely, 2^669615458756 is an apocalyptic number.

It is an amenable number.

669615458756 is a deficient number, since it is larger than the sum of its proper divisors (502345532536).

669615458756 is a wasteful number, since it uses less digits than its factorization.

669615458756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19134070 (or 19134068 counting only the distinct ones).

The product of its digits is 326592000, while the sum is 68.

The spelling of 669615458756 in words is "six hundred sixty-nine billion, six hundred fifteen million, four hundred fifty-eight thousand, seven hundred fifty-six".