666650577237 has 8 divisors (see below), whose sum is σ = 889663203936. Its totient is φ = 444035834352.

The previous prime is 666650577227. The next prime is 666650577259. The reversal of 666650577237 is 732775056666.

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

It is not a de Polignac number, because 666650577237 - 2⁸ = 666650576981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666650577217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99467043 + ... + 99473744.

It is an arithmetic number, because the mean of its divisors is an integer number (111207900492).

Almost surely, 2^666650577237 is an apocalyptic number.

It is an amenable number.

666650577237 is a deficient number, since it is larger than the sum of its proper divisors (223012626699).

666650577237 is a wasteful number, since it uses less digits than its factorization.

666650577237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198941907.

The product of its (nonzero) digits is 66679200, while the sum is 60.

The spelling of 666650577237 in words is "six hundred sixty-six billion, six hundred fifty million, five hundred seventy-seven thousand, two hundred thirty-seven".