6666920 has 32 divisors (see below), whose sum is σ = 16155720. Its totient is φ = 2461440.

The previous prime is 6666883. The next prime is 6666931. The reversal of 6666920 is 296666.

It can be written as a sum of positive squares in 4 ways, for example, as 2365444 + 4301476 = 1538^2 + 2074^2 .

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, 5891 + ... + 6930.

Almost surely, 2^6666920 is an apocalyptic number.

It is an amenable number.

6666920 is an abundant number, since it is smaller than the sum of its proper divisors (9488800).

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

6666920 is a wasteful number, since it uses less digits than its factorization.

6666920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12845 (or 12841 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 6666920 is about 2582.0379547946. The cubic root of 6666920 is about 188.2095897039.

The spelling of 6666920 in words is "six million, six hundred sixty-six thousand, nine hundred twenty".