666140615746012 has 24 divisors (see below), whose sum is σ = 1276063345235952. Its totient is φ = 301757771942400.

The previous prime is 666140615746007. The next prime is 666140615746043. The reversal of 666140615746012 is 210647516041666.

It is a happy number.

It is a super-2 number, since 2×666140615746012² (a number of 30 digits) contains 22 as substring.

It is a congruent 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, 25835412789 + ... + 25835438572.

It is an arithmetic number, because the mean of its divisors is an integer number (53169306051498).

Almost surely, 2^{666140615746012} is an apocalyptic number.

It is an amenable number.

666140615746012 is a deficient number, since it is larger than the sum of its proper divisors (609922729489940).

666140615746012 is a wasteful number, since it uses less digits than its factorization.

666140615746012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51670851669 (or 51670851667 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 666140615746012 in words is "six hundred sixty-six trillion, one hundred forty billion, six hundred fifteen million, seven hundred forty-six thousand, twelve".