6666740068 has 12 divisors (see below), whose sum is σ = 11982114172. Its totient is φ = 3243278880.

The previous prime is 6666740029. The next prime is 6666740089. The reversal of 6666740068 is 8600476666.

It can be written as a sum of positive squares in 2 ways, for example, as 3861131044 + 2805609024 = 62138^2 + 52968^2 .

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, 22522623 + ... + 22522918.

Almost surely, 2^6666740068 is an apocalyptic number.

It is an amenable number.

6666740068 is a deficient number, since it is larger than the sum of its proper divisors (5315374104).

6666740068 is a wasteful number, since it uses less digits than its factorization.

6666740068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45045582 (or 45045580 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 49.

The square root of 6666740068 is about 81650.1075810681. The cubic root of 6666740068 is about 1882.0789650666.

The spelling of 6666740068 in words is "six billion, six hundred sixty-six million, seven hundred forty thousand, sixty-eight".