1266922866000 has 640 divisors, whose sum is σ = 4524468129792. Its totient is φ = 302442240000.

The previous prime is 1266922865981. The next prime is 1266922866029. The reversal of 1266922866000 is 6682296621.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1543145590 + ... + 1543146410.

Almost surely, 2^{1266922866000} is an apocalyptic number.

1266922866000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1266922866000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2262234064896).

1266922866000 is an abundant number, since it is smaller than the sum of its proper divisors (3257545263792).

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

1266922866000 is a wasteful number, since it uses less digits than its factorization.

1266922866000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188 (or 1172 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The spelling of 1266922866000 in words is "one trillion, two hundred sixty-six billion, nine hundred twenty-two million, eight hundred sixty-six thousand".