6642282440 has 16 divisors (see below), whose sum is σ = 14945135580. Its totient is φ = 2656912960.

The previous prime is 6642282431. The next prime is 6642282457. The reversal of 6642282440 is 442822466.

It can be written as a sum of positive squares in 2 ways, for example, as 6088056676 + 554225764 = 78026^2 + 23542^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6642282394 and 6642282403.

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, 83028491 + ... + 83028570.

Almost surely, 2^6642282440 is an apocalyptic number.

It is an amenable number.

6642282440 is an abundant number, since it is smaller than the sum of its proper divisors (8302853140).

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

6642282440 is a wasteful number, since it uses less digits than its factorization.

6642282440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166057072 (or 166057068 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 38.

The square root of 6642282440 is about 81500.1990181619. The cubic root of 6642282440 is about 1879.7746108248.

The spelling of 6642282440 in words is "six billion, six hundred forty-two million, two hundred eighty-two thousand, four hundred forty".