1266680691060 has 24 divisors (see below), whose sum is σ = 3546705935136. Its totient is φ = 337781517600.

The previous prime is 1266680690999. The next prime is 1266680691149. The reversal of 1266680691060 is 601960866621.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1266680690994 and 1266680691012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10555672366 + ... + 10555672485.

It is an arithmetic number, because the mean of its divisors is an integer number (147779413964).

Almost surely, 2^{1266680691060} is an apocalyptic number.

1266680691060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1266680691060 is an abundant number, since it is smaller than the sum of its proper divisors (2280025244076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1266680691060 is a wasteful number, since it uses less digits than its factorization.

1266680691060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21111344863 (or 21111344861 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 51.

The spelling of 1266680691060 in words is "one trillion, two hundred sixty-six billion, six hundred eighty million, six hundred ninety-one thousand, sixty".