6662440 has 16 divisors (see below), whose sum is σ = 14990580. Its totient is φ = 2664960.

The previous prime is 6662437. The next prime is 6662449. The reversal of 6662440 is 442666.

6662440 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6563844 + 98596 = 2562^2 + 314^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6662399 and 6662408.

It is not an unprimeable number, because it can be changed into a prime (6662449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83241 + ... + 83320.

Almost surely, 2^6662440 is an apocalyptic number.

It is an amenable number.

6662440 is an abundant number, since it is smaller than the sum of its proper divisors (8328140).

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

6662440 is a wasteful number, since it uses less digits than its factorization.

6662440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166572 (or 166568 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 6662440 is about 2581.1702772192. The cubic root of 6662440 is about 188.1674229114.

The spelling of 6662440 in words is "six million, six hundred sixty-two thousand, four hundred forty".