1266367877 has 2 divisors, whose sum is σ = 1266367878. Its totient is φ = 1266367876.

The previous prime is 1266367819. The next prime is 1266367891. The reversal of 1266367877 is 7787636621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1221222916 + 45144961 = 34946^2 + 6719^2 .

It is an emirp because it is prime and its reverse (7787636621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1266367877 - 2⁶ = 1266367813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1266367177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633183938 + 633183939.

It is an arithmetic number, because the mean of its divisors is an integer number (633183939).

Almost surely, 2^1266367877 is an apocalyptic number.

It is an amenable number.

1266367877 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266367877 is an equidigital number, since it uses as much as digits as its factorization.

1266367877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3556224, while the sum is 53.

The square root of 1266367877 is about 35586.0629600972. The cubic root of 1266367877 is about 1081.8987736762.

The spelling of 1266367877 in words is "one billion, two hundred sixty-six million, three hundred sixty-seven thousand, eight hundred seventy-seven".