1266772277 has 2 divisors, whose sum is σ = 1266772278. Its totient is φ = 1266772276.

The previous prime is 1266772271. The next prime is 1266772279. The reversal of 1266772277 is 7722776621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1055535121 + 211237156 = 32489^2 + 14534^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266772277 - 2⁴ = 1266772261 is a prime.

Together with 1266772279, 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 (1266772271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633386138 + 633386139.

It is an arithmetic number, because the mean of its divisors is an integer number (633386139).

Almost surely, 2^1266772277 is an apocalyptic number.

It is an amenable number.

1266772277 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266772277 is an equidigital number, since it uses as much as digits as its factorization.

1266772277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 691488, while the sum is 47.

The square root of 1266772277 is about 35591.7445062756. The cubic root of 1266772277 is about 1082.0139253916.

The spelling of 1266772277 in words is "one billion, two hundred sixty-six million, seven hundred seventy-two thousand, two hundred seventy-seven".