667623351330561 has 16 divisors (see below), whose sum is σ = 907923850395840. Its totient is φ = 436220391871680.

The previous prime is 667623351330517. The next prime is 667623351330571. The reversal of 667623351330561 is 165033153326766.

It is not a de Polignac number, because 667623351330561 - 2⁶ = 667623351330497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667623351330571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2230928491 + ... + 2231227728.

It is an arithmetic number, because the mean of its divisors is an integer number (56745240649740).

Almost surely, 2^{667623351330561} is an apocalyptic number.

It is an amenable number.

667623351330561 is a deficient number, since it is larger than the sum of its proper divisors (240300499065279).

667623351330561 is a wasteful number, since it uses less digits than its factorization.

667623351330561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4462157216.

The product of its (nonzero) digits is 36741600, while the sum is 57.

The spelling of 667623351330561 in words is "six hundred sixty-seven trillion, six hundred twenty-three billion, three hundred fifty-one million, three hundred thirty thousand, five hundred sixty-one".