666871628137 has 8 divisors (see below), whose sum is σ = 783457577280. Its totient is φ = 559612554960.

The previous prime is 666871628131. The next prime is 666871628147. The reversal of 666871628137 is 731826178666.

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

It is a cyclic number.

It is not a de Polignac number, because 666871628137 - 2⁷ = 666871628009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666871628131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2331718837 + ... + 2331719122.

It is an arithmetic number, because the mean of its divisors is an integer number (97932197160).

Almost surely, 2^666871628137 is an apocalyptic number.

It is an amenable number.

666871628137 is a deficient number, since it is larger than the sum of its proper divisors (116585949143).

666871628137 is a wasteful number, since it uses less digits than its factorization.

666871628137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4663437983.

The product of its digits is 24385536, while the sum is 61.

The spelling of 666871628137 in words is "six hundred sixty-six billion, eight hundred seventy-one million, six hundred twenty-eight thousand, one hundred thirty-seven".