666140874037071 has 8 divisors (see below), whose sum is σ = 892066381535280. Its totient is φ = 442154641281792.

The previous prime is 666140874037063. The next prime is 666140874037073. The reversal of 666140874037071 is 170730478041666.

It is a happy number.

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

It is not a de Polignac number, because 666140874037071 - 2³ = 666140874037063 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 666140874036996 and 666140874037014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666140874037073) 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, 484818684930 + ... + 484818686303.

It is an arithmetic number, because the mean of its divisors is an integer number (111508297691910).

Almost surely, 2^{666140874037071} is an apocalyptic number.

666140874037071 is a deficient number, since it is larger than the sum of its proper divisors (225925507498209).

666140874037071 is a wasteful number, since it uses less digits than its factorization.

666140874037071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969637371465.

The product of its (nonzero) digits is 28449792, while the sum is 60.

The spelling of 666140874037071 in words is "six hundred sixty-six trillion, one hundred forty billion, eight hundred seventy-four million, thirty-seven thousand, seventy-one".