6668334440 has 16 divisors (see below), whose sum is σ = 15003752580. Its totient is φ = 2667333760.

The previous prime is 6668334437. The next prime is 6668334467. The reversal of 6668334440 is 444338666.

It can be written as a sum of positive squares in 2 ways, for example, as 6116178436 + 552156004 = 78206^2 + 23498^2 .

It is a super-2 number, since 2×6668334440² = 88933368407380227200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6668334391 and 6668334400.

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, 83354141 + ... + 83354220.

Almost surely, 2^6668334440 is an apocalyptic number.

It is an amenable number.

6668334440 is an abundant number, since it is smaller than the sum of its proper divisors (8335418140).

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

6668334440 is a wasteful number, since it uses less digits than its factorization.

6668334440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166708372 (or 166708368 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 44.

The square root of 6668334440 is about 81659.8704383004. The cubic root of 6668334440 is about 1882.2289881560.

The spelling of 6668334440 in words is "six billion, six hundred sixty-eight million, three hundred thirty-four thousand, four hundred forty".