8077661 has 2 divisors, whose sum is σ = 8077662. Its totient is φ = 8077660.

The previous prime is 8077651. The next prime is 8077673. The reversal of 8077661 is 1667708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6661561 + 1416100 = 2581^2 + 1190^2 .

It is a cyclic number.

It is not a de Polignac number, because 8077661 - 2¹⁰ = 8076637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8077621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4038830 + 4038831.

It is an arithmetic number, because the mean of its divisors is an integer number (4038831).

Almost surely, 2^8077661 is an apocalyptic number.

It is an amenable number.

8077661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8077661 is an equidigital number, since it uses as much as digits as its factorization.

8077661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 8077661 is about 2842.1226222667. The cubic root of 8077661 is about 200.6450920442.

The spelling of 8077661 in words is "eight million, seventy-seven thousand, six hundred sixty-one".