8140266640 has 160 divisors (see below), whose sum is σ = 20961908352. Its totient is φ = 2915328000.

The previous prime is 8140266637. The next prime is 8140266643. The reversal of 8140266640 is 466620418.

It is an interprime number because it is at equal distance from previous prime (8140266637) and next prime (8140266643).

It is a self number, because there is not a number n which added to its sum of digits gives 8140266640.

It is not an unprimeable number, because it can be changed into a prime (8140266643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27782334 + ... + 27782626.

Almost surely, 2^8140266640 is an apocalyptic number.

8140266640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8140266640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10480954176).

8140266640 is an abundant number, since it is smaller than the sum of its proper divisors (12821641712).

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

8140266640 is a wasteful number, since it uses less digits than its factorization.

8140266640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689 (or 683 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 8140266640 is about 90223.4262262302. The cubic root of 8140266640 is about 2011.6212293903.

The spelling of 8140266640 in words is "eight billion, one hundred forty million, two hundred sixty-six thousand, six hundred forty".