6626303640 has 192 divisors, whose sum is σ = 23689130400. Its totient is φ = 1606260480.

The previous prime is 6626303633. The next prime is 6626303689. The reversal of 6626303640 is 463036266.

6626303640 is a `hidden beast` number, since 6 + 6 + 2 + 6 + 3 + 0 + 3 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6626303595 and 6626303604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 472246 + ... + 486074.

Almost surely, 2^6626303640 is an apocalyptic number.

6626303640 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 6626303640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11844565200).

6626303640 is an abundant number, since it is smaller than the sum of its proper divisors (17062826760).

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

6626303640 is a wasteful number, since it uses less digits than its factorization.

6626303640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13879 (or 13850 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 36.

The square root of 6626303640 is about 81402.1107834434. The cubic root of 6626303640 is about 1878.2660600842.

The spelling of 6626303640 in words is "six billion, six hundred twenty-six million, three hundred three thousand, six hundred forty".