667648753707 has 32 divisors (see below), whose sum is σ = 984977860608. Its totient is φ = 399597031296.

The previous prime is 667648753669. The next prime is 667648753711. The reversal of 667648753707 is 707357846766.

It is not a de Polignac number, because 667648753707 - 2⁷ = 667648753579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667648753307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3578578 + ... + 3760520.

It is an arithmetic number, because the mean of its divisors is an integer number (30780558144).

Almost surely, 2^667648753707 is an apocalyptic number.

667648753707 is a deficient number, since it is larger than the sum of its proper divisors (317329106901).

667648753707 is a wasteful number, since it uses less digits than its factorization.

667648753707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184539.

The product of its (nonzero) digits is 248935680, while the sum is 66.

The spelling of 667648753707 in words is "six hundred sixty-seven billion, six hundred forty-eight million, seven hundred fifty-three thousand, seven hundred seven".