668255612 has 12 divisors (see below), whose sum is σ = 1230997320. Its totient is φ = 316542096.

The previous prime is 668255603. The next prime is 668255681. The reversal of 668255612 is 216552866.

It is a self number, because there is not a number n which added to its sum of digits gives 668255612.

It is a congruent number.

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, 4396343 + ... + 4396494.

It is an arithmetic number, because the mean of its divisors is an integer number (102583110).

Almost surely, 2^668255612 is an apocalyptic number.

It is an amenable number.

668255612 is a deficient number, since it is larger than the sum of its proper divisors (562741708).

668255612 is a wasteful number, since it uses less digits than its factorization.

668255612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8792860 (or 8792858 counting only the distinct ones).

The product of its digits is 172800, while the sum is 41.

The square root of 668255612 is about 25850.6404562827. The cubic root of 668255612 is about 874.2739498741.

The spelling of 668255612 in words is "six hundred sixty-eight million, two hundred fifty-five thousand, six hundred twelve".