7935531661 has 2 divisors, whose sum is σ = 7935531662. Its totient is φ = 7935531660.

The previous prime is 7935531623. The next prime is 7935531713. The reversal of 7935531661 is 1661355397.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7480520100 + 455011561 = 86490^2 + 21331^2 .

It is a cyclic number.

It is not a de Polignac number, because 7935531661 - 2¹⁷ = 7935400589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7935531601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3967765830 + 3967765831.

It is an arithmetic number, because the mean of its divisors is an integer number (3967765831).

Almost surely, 2^7935531661 is an apocalyptic number.

It is an amenable number.

7935531661 is a deficient number, since it is larger than the sum of its proper divisors (1).

7935531661 is an equidigital number, since it uses as much as digits as its factorization.

7935531661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 510300, while the sum is 46.

The square root of 7935531661 is about 89081.6011362616. The cubic root of 7935531661 is about 1994.6131423253.

The spelling of 7935531661 in words is "seven billion, nine hundred thirty-five million, five hundred thirty-one thousand, six hundred sixty-one".