6626263440 has 160 divisors (see below), whose sum is σ = 20788669440. Its totient is φ = 1745874432.

The previous prime is 6626263381. The next prime is 6626263507. The reversal of 6626263440 is 443626266.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10241197 + ... + 10241843.

It is an arithmetic number, because the mean of its divisors is an integer number (129929184).

Almost surely, 2^6626263440 is an apocalyptic number.

6626263440 is a gapful number since it is divisible by the number (60) 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 6626263440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10394334720).

6626263440 is an abundant number, since it is smaller than the sum of its proper divisors (14162406000).

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

6626263440 is a wasteful number, since it uses less digits than its factorization.

6626263440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109 (or 1103 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 39.

The square root of 6626263440 is about 81401.8638607250. The cubic root of 6626263440 is about 1878.2622617650.

The spelling of 6626263440 in words is "six billion, six hundred twenty-six million, two hundred sixty-three thousand, four hundred forty".