8122669661 has 2 divisors, whose sum is σ = 8122669662. Its totient is φ = 8122669660.

The previous prime is 8122669561. The next prime is 8122669663. The reversal of 8122669661 is 1669662218.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7690237636 + 432432025 = 87694^2 + 20795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8122669661 is a prime.

Together with 8122669663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8122669663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4061334830 + 4061334831.

It is an arithmetic number, because the mean of its divisors is an integer number (4061334831).

Almost surely, 2^8122669661 is an apocalyptic number.

It is an amenable number.

8122669661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8122669661 is an equidigital number, since it uses as much as digits as its factorization.

8122669661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 47.

The square root of 8122669661 is about 90125.8545646032. The cubic root of 8122669661 is about 2010.1706628851.

The spelling of 8122669661 in words is "eight billion, one hundred twenty-two million, six hundred sixty-nine thousand, six hundred sixty-one".