6516666 has 32 divisors (see below), whose sum is σ = 15597120. Its totient is φ = 2004912.

The previous prime is 6516649. The next prime is 6516667. The reversal of 6516666 is 6666156.

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6516666.

It is not an unprimeable number, because it can be changed into a prime (6516667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3940 + ... + 5343.

It is an arithmetic number, because the mean of its divisors is an integer number (487410).

Almost surely, 2^6516666 is an apocalyptic number.

6516666 is an abundant number, since it is smaller than the sum of its proper divisors (9080454).

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

6516666 is a wasteful number, since it uses less digits than its factorization.

6516666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9307 (or 9301 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 6516666 is about 2552.7761358960. The cubic root of 6516666 is about 186.7849243566.

The spelling of 6516666 in words is "six million, five hundred sixteen thousand, six hundred sixty-six".