267665746130681 has 2 divisors, whose sum is σ = 267665746130682. Its totient is φ = 267665746130680.

The previous prime is 267665746130641. The next prime is 267665746130707. The reversal of 267665746130681 is 186031647566762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137806844461456 + 129858901669225 = 11739116^2 + 11395565^2 .

It is a cyclic number.

It is not a de Polignac number, because 267665746130681 - 2¹⁰ = 267665746129657 is a prime.

It is a super-2 number, since 2×267665746130681² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (267665746130641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133832873065340 + 133832873065341.

It is an arithmetic number, because the mean of its divisors is an integer number (133832873065341).

Almost surely, 2^{267665746130681} is an apocalyptic number.

It is an amenable number.

267665746130681 is a deficient number, since it is larger than the sum of its proper divisors (1).

267665746130681 is an equidigital number, since it uses as much as digits as its factorization.

267665746130681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 365783040, while the sum is 68.

The spelling of 267665746130681 in words is "two hundred sixty-seven trillion, six hundred sixty-five billion, seven hundred forty-six million, one hundred thirty thousand, six hundred eighty-one".