772833661 has 2 divisors, whose sum is σ = 772833662. Its totient is φ = 772833660.

The previous prime is 772833631. The next prime is 772833671. The reversal of 772833661 is 166338277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 422919225 + 349914436 = 20565^2 + 18706^2 .

It is a cyclic number.

It is not a de Polignac number, because 772833661 - 2¹⁵ = 772800893 is a prime.

It is equal to p_39819715 and since 772833661 and 39819715 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (772833631) 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, 386416830 + 386416831.

It is an arithmetic number, because the mean of its divisors is an integer number (386416831).

Almost surely, 2^772833661 is an apocalyptic number.

It is an amenable number.

772833661 is a deficient number, since it is larger than the sum of its proper divisors (1).

772833661 is an equidigital number, since it uses as much as digits as its factorization.

772833661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 43.

The square root of 772833661 is about 27799.8859889748. The cubic root of 772833661 is about 917.6886137488.

The spelling of 772833661 in words is "seven hundred seventy-two million, eight hundred thirty-three thousand, six hundred sixty-one".