79946221266 has 80 divisors (see below), whose sum is σ = 190000068984. Its totient is φ = 25038360576.

The previous prime is 79946221231. The next prime is 79946221273. The reversal of 79946221266 is 66212264997.

79946221266 is a `hidden beast` number, since 7 + 9 + 9 + 4 + 622 + 1 + 2 + 6 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 76685240241 + 3260981025 = 276921^2 + 57105^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1608646 + ... + 1657598.

Almost surely, 2^79946221266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79946221266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95000034492).

79946221266 is an abundant number, since it is smaller than the sum of its proper divisors (110053847718).

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

79946221266 is a wasteful number, since it uses less digits than its factorization.

79946221266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49577 (or 49568 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The spelling of 79946221266 in words is "seventy-nine billion, nine hundred forty-six million, two hundred twenty-one thousand, two hundred sixty-six".