6666988 has 12 divisors (see below), whose sum is σ = 11690560. Its totient is φ = 3326832.

The previous prime is 6666977. The next prime is 6666991. The reversal of 6666988 is 8896666.

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, 1093 + ... + 3811.

Almost surely, 2^6666988 is an apocalyptic number.

It is an amenable number.

6666988 is a deficient number, since it is larger than the sum of its proper divisors (5023572).

6666988 is a wasteful number, since it uses less digits than its factorization.

6666988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336 (or 3334 counting only the distinct ones).

The product of its digits is 746496, while the sum is 49.

The square root of 6666988 is about 2582.0511226542. The cubic root of 6666988 is about 188.2102295901.

The spelling of 6666988 in words is "six million, six hundred sixty-six thousand, nine hundred eighty-eight".