7996661 has 2 divisors, whose sum is σ = 7996662. Its totient is φ = 7996660.

The previous prime is 7996649. The next prime is 7996669. The reversal of 7996661 is 1666997.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7672900 + 323761 = 2770^2 + 569^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7996661 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7996669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3998330 + 3998331.

It is an arithmetic number, because the mean of its divisors is an integer number (3998331).

Almost surely, 2^7996661 is an apocalyptic number.

It is an amenable number.

7996661 is a deficient number, since it is larger than the sum of its proper divisors (1).

7996661 is an equidigital number, since it uses as much as digits as its factorization.

7996661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 44.

The square root of 7996661 is about 2827.8368057581. The cubic root of 7996661 is about 199.9721711279.

The spelling of 7996661 in words is "seven million, nine hundred ninety-six thousand, six hundred sixty-one".