666137713005271 has 16 divisors (see below), whose sum is σ = 749051951306400. Its totient is φ = 588144495028608.

The previous prime is 666137713005241. The next prime is 666137713005299. The reversal of 666137713005271 is 172500317731666.

It is a cyclic number.

It is not a de Polignac number, because 666137713005271 - 2¹¹ = 666137713003223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666137713005241) 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, 8256705156 + ... + 8256785833.

It is an arithmetic number, because the mean of its divisors is an integer number (46815746956650).

Almost surely, 2^{666137713005271} is an apocalyptic number.

666137713005271 is a deficient number, since it is larger than the sum of its proper divisors (82914238301129).

666137713005271 is a wasteful number, since it uses less digits than its factorization.

666137713005271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16513491138.

The product of its (nonzero) digits is 6667920, while the sum is 55.

The spelling of 666137713005271 in words is "six hundred sixty-six trillion, one hundred thirty-seven billion, seven hundred thirteen million, five thousand, two hundred seventy-one".