1266697497123 has 6 divisors (see below), whose sum is σ = 1829674162524. Its totient is φ = 844464998076.

The previous prime is 1266697497113. The next prime is 1266697497127. The reversal of 1266697497123 is 3217947966621.

It is not a de Polignac number, because 1266697497123 - 2¹² = 1266697493027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1266697497127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70372083165 + ... + 70372083182.

It is an arithmetic number, because the mean of its divisors is an integer number (304945693754).

Almost surely, 2^{1266697497123} is an apocalyptic number.

1266697497123 is a deficient number, since it is larger than the sum of its proper divisors (562976665401).

1266697497123 is a wasteful number, since it uses less digits than its factorization.

1266697497123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140744166353 (or 140744166350 counting only the distinct ones).

The product of its digits is 41150592, while the sum is 63.

The spelling of 1266697497123 in words is "one trillion, two hundred sixty-six billion, six hundred ninety-seven million, four hundred ninety-seven thousand, one hundred twenty-three".