8266510640 has 40 divisors (see below), whose sum is σ = 19409949648. Its totient is φ = 3273862400.

The previous prime is 8266510621. The next prime is 8266510643. The reversal of 8266510640 is 460156628.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×8266510640² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8266510594 and 8266510603.

It is not an unprimeable number, because it can be changed into a prime (8266510643) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 503462 + ... + 519621.

Almost surely, 2^8266510640 is an apocalyptic number.

8266510640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8266510640 is an abundant number, since it is smaller than the sum of its proper divisors (11143439008).

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

8266510640 is a wasteful number, since it uses less digits than its factorization.

8266510640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023197 (or 1023191 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 8266510640 is about 90920.3532769203. The cubic root of 8266510640 is about 2021.9670607670.

The spelling of 8266510640 in words is "eight billion, two hundred sixty-six million, five hundred ten thousand, six hundred forty".