4065611161266 has 80 divisors (see below), whose sum is σ = 9224948551104. Its totient is φ = 1338176928096.

The previous prime is 4065611161237. The next prime is 4065611161303. The reversal of 4065611161266 is 6621611165604.

4065611161266 is a `hidden beast` number, since 4 + 0 + 6 + 5 + 611 + 1 + 6 + 1 + 26 + 6 = 666.

It is a super-2 number, since 2×4065611161266² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5438956 + ... + 6141128.

Almost surely, 2^{4065611161266} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4065611161266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4612474275552).

4065611161266 is an abundant number, since it is smaller than the sum of its proper divisors (5159337389838).

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

4065611161266 is a wasteful number, since it uses less digits than its factorization.

4065611161266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702637 (or 702628 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 4065611161266 in words is "four trillion, sixty-five billion, six hundred eleven million, one hundred sixty-one thousand, two hundred sixty-six".