6666893 has 4 divisors (see below), whose sum is σ = 6678588. Its totient is φ = 6655200.

The previous prime is 6666883. The next prime is 6666931. The reversal of 6666893 is 3986666.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5579044 + 1087849 = 2362^2 + 1043^2 .

It is a cyclic number.

It is not a de Polignac number, because 6666893 - 2²⁰ = 5618317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4946 + ... + 6147.

It is an arithmetic number, because the mean of its divisors is an integer number (1669647).

Almost surely, 2^6666893 is an apocalyptic number.

It is an amenable number.

6666893 is a deficient number, since it is larger than the sum of its proper divisors (11695).

6666893 is a wasteful number, since it uses less digits than its factorization.

6666893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11694.

The product of its digits is 279936, while the sum is 44.

The square root of 6666893 is about 2582.0327263612. The cubic root of 6666893 is about 188.2093356303.

The spelling of 6666893 in words is "six million, six hundred sixty-six thousand, eight hundred ninety-three".