2666738812127 has 32 divisors (see below), whose sum is σ = 3037691825280. Its totient is φ = 2323757560320.

The previous prime is 2666738812081. The next prime is 2666738812217. The reversal of 2666738812127 is 7212188376662.

It is a cyclic number.

It is not a de Polignac number, because 2666738812127 - 2³⁶ = 2598019335391 is a prime.

It is a super-2 number, since 2×2666738812127² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666738818127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3493313 + ... + 4187685.

It is an arithmetic number, because the mean of its divisors is an integer number (94927869540).

Almost surely, 2^{2666738812127} is an apocalyptic number.

2666738812127 is a deficient number, since it is larger than the sum of its proper divisors (370953013153).

2666738812127 is a wasteful number, since it uses less digits than its factorization.

2666738812127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694643.

The product of its digits is 16257024, while the sum is 59.

The spelling of 2666738812127 in words is "two trillion, six hundred sixty-six billion, seven hundred thirty-eight million, eight hundred twelve thousand, one hundred twenty-seven".