1266904140968 has 8 divisors (see below), whose sum is σ = 2375445264330. Its totient is φ = 633452070480.

The previous prime is 1266904140967. The next prime is 1266904140973. The reversal of 1266904140968 is 8690414096621.

It can be written as a sum of positive squares in only one way, i.e., 1252747424644 + 14156716324 = 1119262^2 + 118982^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1266904140968² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1266904140967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79181508803 + ... + 79181508818.

Almost surely, 2^{1266904140968} is an apocalyptic number.

It is an amenable number.

1266904140968 is a deficient number, since it is larger than the sum of its proper divisors (1108541123362).

1266904140968 is a wasteful number, since it uses less digits than its factorization.

1266904140968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158363017627 (or 158363017623 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 56.

The spelling of 1266904140968 in words is "one trillion, two hundred sixty-six billion, nine hundred four million, one hundred forty thousand, nine hundred sixty-eight".