1266805097 has 2 divisors, whose sum is σ = 1266805098. Its totient is φ = 1266805096.

The previous prime is 1266805091. The next prime is 1266805103. The reversal of 1266805097 is 7905086621.

It is a balanced prime because it is at equal distance from previous prime (1266805091) and next prime (1266805103).

It can be written as a sum of positive squares in only one way, i.e., 677092441 + 589712656 = 26021^2 + 24284^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266805097 - 2²² = 1262610793 is a prime.

It is not a weakly prime, because it can be changed into another prime (1266805091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633402548 + 633402549.

It is an arithmetic number, because the mean of its divisors is an integer number (633402549).

Almost surely, 2^1266805097 is an apocalyptic number.

It is an amenable number.

1266805097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266805097 is an equidigital number, since it uses as much as digits as its factorization.

1266805097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 1266805097 is about 35592.2055652639. The cubic root of 1266805097 is about 1082.0232697152.

The spelling of 1266805097 in words is "one billion, two hundred sixty-six million, eight hundred five thousand, ninety-seven".