6622620440 has 16 divisors (see below), whose sum is σ = 14900896080. Its totient is φ = 2649048160.

The previous prime is 6622620413. The next prime is 6622620457. The reversal of 6622620440 is 440262266.

It is a junction number, because it is equal to n+sod(n) for n = 6622620397 and 6622620406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82782716 + ... + 82782795.

It is an arithmetic number, because the mean of its divisors is an integer number (931306005).

Almost surely, 2^6622620440 is an apocalyptic number.

It is an amenable number.

6622620440 is an abundant number, since it is smaller than the sum of its proper divisors (8278275640).

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

6622620440 is a wasteful number, since it uses less digits than its factorization.

6622620440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165565522 (or 165565518 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 6622620440 is about 81379.4841468045. The cubic root of 6622620440 is about 1877.9179871057.

The spelling of 6622620440 in words is "six billion, six hundred twenty-two million, six hundred twenty thousand, four hundred forty".