1279942226766 has 396 divisors, whose sum is σ = 3482727914952. Its totient is φ = 351744972768.

The previous prime is 1279942226701. The next prime is 1279942226803. The reversal of 1279942226766 is 6676222499721.

1279942226766 is a `hidden beast` number, since 1 + 2 + 7 + 99 + 422 + 2 + 67 + 66 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 197 ways as a sum of consecutive naturals, for example, 4866700351 + ... + 4866700613.

It is an arithmetic number, because the mean of its divisors is an integer number (8794767462).

Almost surely, 2^{1279942226766} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1279942226766, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1741363957476).

1279942226766 is an abundant number, since it is smaller than the sum of its proper divisors (2202785688186).

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

1279942226766 is an frugal number, since it uses more digits than its factorization.

1279942226766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367 (or 304 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 63.

The spelling of 1279942226766 in words is "one trillion, two hundred seventy-nine billion, nine hundred forty-two million, two hundred twenty-six thousand, seven hundred sixty-six".