669056516675 has 12 divisors (see below), whose sum is σ = 829651061880. Its totient is φ = 535231677120.

The previous prime is 669056516671. The next prime is 669056516677. The reversal of 669056516675 is 576615650966.

It is a happy number.

It is not a de Polignac number, because 669056516675 - 2² = 669056516671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (669056516671) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 736904 + ... + 1371546.

It is an arithmetic number, because the mean of its divisors is an integer number (69137588490).

Almost surely, 2^669056516675 is an apocalyptic number.

669056516675 is a deficient number, since it is larger than the sum of its proper divisors (160594545205).

669056516675 is a wasteful number, since it uses less digits than its factorization.

669056516675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676822 (or 676817 counting only the distinct ones).

The product of its (nonzero) digits is 61236000, while the sum is 62.

The spelling of 669056516675 in words is "six hundred sixty-nine billion, fifty-six million, five hundred sixteen thousand, six hundred seventy-five".