666140615746043 has 2 divisors, whose sum is σ = 666140615746044. Its totient is φ = 666140615746042.

The previous prime is 666140615746007. The next prime is 666140615746117. The reversal of 666140615746043 is 340647516041666.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666140615746043 - 2³⁰ = 666139542004219 is a prime.

It is a super-2 number, since 2×666140615746043² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (666140615748043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333070307873021 + 333070307873022.

It is an arithmetic number, because the mean of its divisors is an integer number (333070307873022).

Almost surely, 2^{666140615746043} is an apocalyptic number.

666140615746043 is a deficient number, since it is larger than the sum of its proper divisors (1).

666140615746043 is an equidigital number, since it uses as much as digits as its factorization.

666140615746043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52254720, while the sum is 59.

The spelling of 666140615746043 in words is "six hundred sixty-six trillion, one hundred forty billion, six hundred fifteen million, seven hundred forty-six thousand, forty-three".