2666223631 has 2 divisors, whose sum is σ = 2666223632. Its totient is φ = 2666223630.

The previous prime is 2666223607. The next prime is 2666223647. The reversal of 2666223631 is 1363226662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2666223631 - 2²⁵ = 2632669199 is a prime.

It is a super-2 number, since 2×2666223631² = 14217496901005648322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2666223031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333111815 + 1333111816.

It is an arithmetic number, because the mean of its divisors is an integer number (1333111816).

Almost surely, 2^2666223631 is an apocalyptic number.

2666223631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666223631 is an equidigital number, since it uses as much as digits as its factorization.

2666223631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 37.

The square root of 2666223631 is about 51635.4880968506. The cubic root of 2666223631 is about 1386.6457485044.

The spelling of 2666223631 in words is "two billion, six hundred sixty-six million, two hundred twenty-three thousand, six hundred thirty-one".