11666271431 has 2 divisors, whose sum is σ = 11666271432. Its totient is φ = 11666271430.

The previous prime is 11666271361. The next prime is 11666271451. The reversal of 11666271431 is 13417266611.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11666271431 - 2¹⁸ = 11666009287 is a prime.

It is a super-2 number, since 2×11666271431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11666271451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5833135715 + 5833135716.

It is an arithmetic number, because the mean of its divisors is an integer number (5833135716).

Almost surely, 2^11666271431 is an apocalyptic number.

11666271431 is a deficient number, since it is larger than the sum of its proper divisors (1).

11666271431 is an equidigital number, since it uses as much as digits as its factorization.

11666271431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The spelling of 11666271431 in words is "eleven billion, six hundred sixty-six million, two hundred seventy-one thousand, four hundred thirty-one".