6666727940 has 24 divisors (see below), whose sum is σ = 14451747072. Its totient is φ = 2580668640.

The previous prime is 6666727927. The next prime is 6666727979. The reversal of 6666727940 is 497276666.

It is a super-2 number, since 2×6666727940² = 88890522851953287200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5375774 + ... + 5377013.

It is an arithmetic number, because the mean of its divisors is an integer number (602156128).

Almost surely, 2^6666727940 is an apocalyptic number.

It is an amenable number.

6666727940 is an abundant number, since it is smaller than the sum of its proper divisors (7785019132).

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

6666727940 is a wasteful number, since it uses less digits than its factorization.

6666727940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10752827 (or 10752825 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 53.

The square root of 6666727940 is about 81650.0333129142. The cubic root of 6666727940 is about 1882.0778237858.

The spelling of 6666727940 in words is "six billion, six hundred sixty-six million, seven hundred twenty-seven thousand, nine hundred forty".