7671886661 has 2 divisors, whose sum is σ = 7671886662. Its totient is φ = 7671886660.

The previous prime is 7671886637. The next prime is 7671886679. The reversal of 7671886661 is 1666881767.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7192057636 + 479829025 = 84806^2 + 21905^2 .

It is a cyclic number.

It is not a de Polignac number, because 7671886661 - 2¹⁴ = 7671870277 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7671886597 and 7671886606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7671886561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3835943330 + 3835943331.

It is an arithmetic number, because the mean of its divisors is an integer number (3835943331).

Almost surely, 2^7671886661 is an apocalyptic number.

It is an amenable number.

7671886661 is a deficient number, since it is larger than the sum of its proper divisors (1).

7671886661 is an equidigital number, since it uses as much as digits as its factorization.

7671886661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4064256, while the sum is 56.

The square root of 7671886661 is about 87589.3067731444. The cubic root of 7671886661 is about 1972.2746502693.

The spelling of 7671886661 in words is "seven billion, six hundred seventy-one million, eight hundred eighty-six thousand, six hundred sixty-one".