669998524 has 24 divisors (see below), whose sum is σ = 1263750768. Its totient is φ = 308970240.

The previous prime is 669998519. The next prime is 669998561. The reversal of 669998524 is 425899966.

It is a congruent number.

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, 66039 + ... + 75505.

It is an arithmetic number, because the mean of its divisors is an integer number (52656282).

Almost surely, 2^669998524 is an apocalyptic number.

It is an amenable number.

669998524 is a deficient number, since it is larger than the sum of its proper divisors (593752244).

669998524 is a wasteful number, since it uses less digits than its factorization.

669998524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10845 (or 10843 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 58.

The square root of 669998524 is about 25884.3296996465. The cubic root of 669998524 is about 875.0333697206.

The spelling of 669998524 in words is "six hundred sixty-nine million, nine hundred ninety-eight thousand, five hundred twenty-four".