668826905026 has 24 divisors (see below), whose sum is σ = 1228457584080. Its totient is φ = 271553780232.

The previous prime is 668826904997. The next prime is 668826905027. The reversal of 668826905026 is 620509628866.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (668826905027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179597200 + ... + 179600923.

It is an arithmetic number, because the mean of its divisors is an integer number (51185732670).

Almost surely, 2^668826905026 is an apocalyptic number.

668826905026 is a deficient number, since it is larger than the sum of its proper divisors (559630679054).

668826905026 is a wasteful number, since it uses less digits than its factorization.

668826905026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359198158 (or 359198151 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 58.

The spelling of 668826905026 in words is "six hundred sixty-eight billion, eight hundred twenty-six million, nine hundred five thousand, twenty-six".