668826905043 has 64 divisors (see below), whose sum is σ = 1039892926464. Its totient is φ = 381669235200.

The previous prime is 668826905029. The next prime is 668826905077. The reversal of 668826905043 is 340509628866.

It is not a de Polignac number, because 668826905043 - 2⁴ = 668826905027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (668826505043) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4506955 + ... + 4652987.

It is an arithmetic number, because the mean of its divisors is an integer number (16248326976).

Almost surely, 2^668826905043 is an apocalyptic number.

668826905043 is a deficient number, since it is larger than the sum of its proper divisors (371066021421).

668826905043 is a wasteful number, since it uses less digits than its factorization.

668826905043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146137 (or 146115 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 57.

The spelling of 668826905043 in words is "six hundred sixty-eight billion, eight hundred twenty-six million, nine hundred five thousand, forty-three".