666137756674345 has 8 divisors (see below), whose sum is σ = 799518238078464. Its totient is φ = 532808251959984.

The previous prime is 666137756674253. The next prime is 666137756674367. The reversal of 666137756674345 is 543476657731666.

666137756674345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 666137756674345 - 2⁷ = 666137756674217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12744143689 + ... + 12744195958.

It is an arithmetic number, because the mean of its divisors is an integer number (99939779759808).

Almost surely, 2^{666137756674345} is an apocalyptic number.

It is an amenable number.

666137756674345 is a deficient number, since it is larger than the sum of its proper divisors (133380481404119).

666137756674345 is a wasteful number, since it uses less digits than its factorization.

666137756674345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25488344879.

The product of its digits is 9601804800, while the sum is 76.

The spelling of 666137756674345 in words is "six hundred sixty-six trillion, one hundred thirty-seven billion, seven hundred fifty-six million, six hundred seventy-four thousand, three hundred forty-five".