1266365101 has 2 divisors, whose sum is σ = 1266365102. Its totient is φ = 1266365100.

The previous prime is 1266365083. The next prime is 1266365129. The reversal of 1266365101 is 1015636621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1265509476 + 855625 = 35574^2 + 925^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266365101 - 2¹³ = 1266356909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1266365201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633182550 + 633182551.

It is an arithmetic number, because the mean of its divisors is an integer number (633182551).

Almost surely, 2^1266365101 is an apocalyptic number.

It is an amenable number.

1266365101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266365101 is an equidigital number, since it uses as much as digits as its factorization.

1266365101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1266365101 is about 35586.0239560421. The cubic root of 1266365101 is about 1081.8979831337.

The spelling of 1266365101 in words is "one billion, two hundred sixty-six million, three hundred sixty-five thousand, one hundred one".