766222277 has 2 divisors, whose sum is σ = 766222278. Its totient is φ = 766222276.

The previous prime is 766222243. The next prime is 766222279. The reversal of 766222277 is 772222667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 553237441 + 212984836 = 23521^2 + 14594^2 .

It is a cyclic number.

It is not a de Polignac number, because 766222277 - 2⁶ = 766222213 is a prime.

Together with 766222279, 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 (766222279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 383111138 + 383111139.

It is an arithmetic number, because the mean of its divisors is an integer number (383111139).

Almost surely, 2^766222277 is an apocalyptic number.

It is an amenable number.

766222277 is a deficient number, since it is larger than the sum of its proper divisors (1).

766222277 is an equidigital number, since it uses as much as digits as its factorization.

766222277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 197568, while the sum is 41.

The square root of 766222277 is about 27680.7203121595. The cubic root of 766222277 is about 915.0642561900.

The spelling of 766222277 in words is "seven hundred sixty-six million, two hundred twenty-two thousand, two hundred seventy-seven".