668400670035 has 48 divisors (see below), whose sum is σ = 1324134639360. Its totient is φ = 305539652160.

The previous prime is 668400670033. The next prime is 668400670081. The reversal of 668400670035 is 530076004866.

It is not a de Polignac number, because 668400670035 - 2¹ = 668400670033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (668400670033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8788120 + ... + 8863850.

It is an arithmetic number, because the mean of its divisors is an integer number (27586138320).

Almost surely, 2^668400670035 is an apocalyptic number.

668400670035 is a deficient number, since it is larger than the sum of its proper divisors (655733969325).

668400670035 is a wasteful number, since it uses less digits than its factorization.

668400670035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103768 (or 103765 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 668400670035 in words is "six hundred sixty-eight billion, four hundred million, six hundred seventy thousand, thirty-five".