6666280 has 16 divisors (see below), whose sum is σ = 14999220. Its totient is φ = 2666496.

The previous prime is 6666269. The next prime is 6666337. The reversal of 6666280 is 826666.

It can be written as a sum of positive squares in 2 ways, for example, as 6625476 + 40804 = 2574^2 + 202^2 .

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, 83289 + ... + 83368.

Almost surely, 2^6666280 is an apocalyptic number.

It is an amenable number.

6666280 is an abundant number, since it is smaller than the sum of its proper divisors (8332940).

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

6666280 is a wasteful number, since it uses less digits than its factorization.

6666280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166668 (or 166664 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 6666280 is about 2581.9140187078. The cubic root of 6666280 is about 188.2035670332.

The spelling of 6666280 in words is "six million, six hundred sixty-six thousand, two hundred eighty".