2650131661 has 2 divisors, whose sum is σ = 2650131662. Its totient is φ = 2650131660.

The previous prime is 2650131619. The next prime is 2650131727. The reversal of 2650131661 is 1661310562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2333469636 + 316662025 = 48306^2 + 17795^2 .

It is a cyclic number.

It is not a de Polignac number, because 2650131661 - 2⁹ = 2650131149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2650131611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1325065830 + 1325065831.

It is an arithmetic number, because the mean of its divisors is an integer number (1325065831).

Almost surely, 2^2650131661 is an apocalyptic number.

It is an amenable number.

2650131661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2650131661 is an equidigital number, since it uses as much as digits as its factorization.

2650131661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 2650131661 is about 51479.4294937308. The cubic root of 2650131661 is about 1383.8504210150.

The spelling of 2650131661 in words is "two billion, six hundred fifty million, one hundred thirty-one thousand, six hundred sixty-one".