2666515231 has 2 divisors, whose sum is σ = 2666515232. Its totient is φ = 2666515230.

The previous prime is 2666515217. The next prime is 2666515253. The reversal of 2666515231 is 1325156662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2666515231 - 2⁵ = 2666515199 is a prime.

It is a super-2 number, since 2×2666515231² = 14220606954309966722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2666515261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333257615 + 1333257616.

It is an arithmetic number, because the mean of its divisors is an integer number (1333257616).

Almost surely, 2^2666515231 is an apocalyptic number.

2666515231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666515231 is an equidigital number, since it uses as much as digits as its factorization.

2666515231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 37.

The square root of 2666515231 is about 51638.3116590773. The cubic root of 2666515231 is about 1386.6962982977.

The spelling of 2666515231 in words is "two billion, six hundred sixty-six million, five hundred fifteen thousand, two hundred thirty-one".