8126766440 has 32 divisors (see below), whose sum is σ = 19691781480. Its totient is φ = 3000652032.

The previous prime is 8126766371. The next prime is 8126766443. The reversal of 8126766440 is 446676218.

It can be written as a sum of positive squares in 4 ways, for example, as 5978073124 + 2148693316 = 77318^2 + 46354^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8126766391 and 8126766400.

It is not an unprimeable number, because it can be changed into a prime (8126766443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7813679 + ... + 7814718.

Almost surely, 2^8126766440 is an apocalyptic number.

It is an amenable number.

8126766440 is an abundant number, since it is smaller than the sum of its proper divisors (11565015040).

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

8126766440 is a wasteful number, since it uses less digits than its factorization.

8126766440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15628421 (or 15628417 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 8126766440 is about 90148.5798002387. The cubic root of 8126766440 is about 2010.5085583954.

The spelling of 8126766440 in words is "eight billion, one hundred twenty-six million, seven hundred sixty-six thousand, four hundred forty".