666140615747746 has 16 divisors (see below), whose sum is σ = 1002156102342720. Its totient is φ = 332089299012240.

The previous prime is 666140615747741. The next prime is 666140615747797. The reversal of 666140615747746 is 647747516041666.

It is not an unprimeable number, because it can be changed into a prime (666140615747741) 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, 177486150 + ... + 181200481.

It is an arithmetic number, because the mean of its divisors is an integer number (62634756396420).

Almost surely, 2^{666140615747746} is an apocalyptic number.

666140615747746 is a deficient number, since it is larger than the sum of its proper divisors (336015486594974).

666140615747746 is a wasteful number, since it uses less digits than its factorization.

666140615747746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358689369.

The product of its (nonzero) digits is 853493760, while the sum is 70.

The spelling of 666140615747746 in words is "six hundred sixty-six trillion, one hundred forty billion, six hundred fifteen million, seven hundred forty-seven thousand, seven hundred forty-six".