668005612 has 12 divisors (see below), whose sum is σ = 1174161240. Its totient is φ = 332530976.

The previous prime is 668005529. The next prime is 668005621. The reversal of 668005612 is 216500866.

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, 366937 + ... + 368752.

It is an arithmetic number, because the mean of its divisors is an integer number (97846770).

Almost surely, 2^668005612 is an apocalyptic number.

It is an amenable number.

668005612 is a deficient number, since it is larger than the sum of its proper divisors (506155628).

668005612 is a wasteful number, since it uses less digits than its factorization.

668005612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735920 (or 735918 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 668005612 is about 25845.8045338117. The cubic root of 668005612 is about 874.1649118826.

The spelling of 668005612 in words is "six hundred sixty-eight million, five thousand, six hundred twelve".