1266566103 has 12 divisors (see below), whose sum is σ = 1995801288. Its totient is φ = 767615760.

The previous prime is 1266566071. The next prime is 1266566107. The reversal of 1266566103 is 3016656621.

It is not a de Polignac number, because 1266566103 - 2⁵ = 1266566071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266566107) 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 in 11 ways as a sum of consecutive naturals, for example, 6396700 + ... + 6396897.

It is an arithmetic number, because the mean of its divisors is an integer number (166316774).

Almost surely, 2^1266566103 is an apocalyptic number.

1266566103 is a deficient number, since it is larger than the sum of its proper divisors (729235185).

1266566103 is a wasteful number, since it uses less digits than its factorization.

1266566103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12793614 (or 12793611 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 1266566103 is about 35588.8480145115. The cubic root of 1266566103 is about 1081.9552210118.

The spelling of 1266566103 in words is "one billion, two hundred sixty-six million, five hundred sixty-six thousand, one hundred three".