664841566137 has 8 divisors (see below), whose sum is σ = 1013091910336. Its totient is φ = 379909466352.

The previous prime is 664841566111. The next prime is 664841566183. The reversal of 664841566137 is 731665148466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 664841566137 - 2⁷ = 664841566009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664841566537) 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 7 ways as a sum of consecutive naturals, for example, 15829561078 + ... + 15829561119.

It is an arithmetic number, because the mean of its divisors is an integer number (126636488792).

Almost surely, 2^664841566137 is an apocalyptic number.

It is an amenable number.

664841566137 is a deficient number, since it is larger than the sum of its proper divisors (348250344199).

664841566137 is a wasteful number, since it uses less digits than its factorization.

664841566137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31659122207.

The product of its digits is 17418240, while the sum is 57.

The spelling of 664841566137 in words is "six hundred sixty-four billion, eight hundred forty-one million, five hundred sixty-six thousand, one hundred thirty-seven".