2665623187 has 2 divisors, whose sum is σ = 2665623188. Its totient is φ = 2665623186.

The previous prime is 2665623139. The next prime is 2665623197. The reversal of 2665623187 is 7813265662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2665623187 - 2¹¹ = 2665621139 is a prime.

It is not a weakly prime, because it can be changed into another prime (2665623197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332811593 + 1332811594.

It is an arithmetic number, because the mean of its divisors is an integer number (1332811594).

Almost surely, 2^2665623187 is an apocalyptic number.

2665623187 is a deficient number, since it is larger than the sum of its proper divisors (1).

2665623187 is an equidigital number, since it uses as much as digits as its factorization.

2665623187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 46.

The square root of 2665623187 is about 51629.6735124289. The cubic root of 2665623187 is about 1386.5416480056.

The spelling of 2665623187 in words is "two billion, six hundred sixty-five million, six hundred twenty-three thousand, one hundred eighty-seven".