2666680 has 32 divisors (see below), whose sum is σ = 6051600. Its totient is φ = 1057536.

The previous prime is 2666663. The next prime is 2666683. The reversal of 2666680 is 866662.

It is a super-2 number, since 2×2666680² = 14222364444800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6316 + ... + 6724.

2^2666680 is an apocalyptic number.

2666680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2666680 is an abundant number, since it is smaller than the sum of its proper divisors (3384920).

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

2666680 is a wasteful number, since it uses less digits than its factorization.

2666680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583 (or 579 counting only the distinct ones).

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

The square root of 2666680 is about 1632.9972443333. The cubic root of 2666680 is about 138.6724859902.

The spelling of 2666680 in words is "two million, six hundred sixty-six thousand, six hundred eighty".