666140874037123 has 8 divisors (see below), whose sum is σ = 667500714290000. Its totient is φ = 664781133339648.

The previous prime is 666140874037091. The next prime is 666140874037231. The reversal of 666140874037123 is 321730478041666.

It is a happy number.

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 666140874037123 - 2⁵ = 666140874037091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666140874035123) 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, 11485518 + ... + 38264851.

It is an arithmetic number, because the mean of its divisors is an integer number (83437589286250).

Almost surely, 2^{666140874037123} is an apocalyptic number.

666140874037123 is a deficient number, since it is larger than the sum of its proper divisors (1359840252877).

666140874037123 is a wasteful number, since it uses less digits than its factorization.

666140874037123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49777701.

The product of its (nonzero) digits is 24385536, while the sum is 58.

The spelling of 666140874037123 in words is "six hundred sixty-six trillion, one hundred forty billion, eight hundred seventy-four million, thirty-seven thousand, one hundred twenty-three".