2661492571 has 2 divisors, whose sum is σ = 2661492572. Its totient is φ = 2661492570.

The previous prime is 2661492529. The next prime is 2661492601. The reversal of 2661492571 is 1752941662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2661492571 - 2⁹ = 2661492059 is a prime.

It is not a weakly prime, because it can be changed into another prime (2661492521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330746285 + 1330746286.

It is an arithmetic number, because the mean of its divisors is an integer number (1330746286).

Almost surely, 2^2661492571 is an apocalyptic number.

2661492571 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661492571 is an equidigital number, since it uses as much as digits as its factorization.

2661492571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 2661492571 is about 51589.6556588625. The cubic root of 2661492571 is about 1385.8250886164.

The spelling of 2661492571 in words is "two billion, six hundred sixty-one million, four hundred ninety-two thousand, five hundred seventy-one".