2661523237 has 2 divisors, whose sum is σ = 2661523238. Its totient is φ = 2661523236.

The previous prime is 2661523187. The next prime is 2661523261. The reversal of 2661523237 is 7323251662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1933009156 + 728514081 = 43966^2 + 26991^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2661523237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2661523196 and 2661523205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2661523037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330761618 + 1330761619.

It is an arithmetic number, because the mean of its divisors is an integer number (1330761619).

Almost surely, 2^2661523237 is an apocalyptic number.

It is an amenable number.

2661523237 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661523237 is an equidigital number, since it uses as much as digits as its factorization.

2661523237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 37.

The square root of 2661523237 is about 51589.9528687515. The cubic root of 2661523237 is about 1385.8304111373.

Adding to 2661523237 its reverse (7323251662), we get a palindrome (9984774899).

The spelling of 2661523237 in words is "two billion, six hundred sixty-one million, five hundred twenty-three thousand, two hundred thirty-seven".