2666831 has 4 divisors (see below), whose sum is σ = 2704464. Its totient is φ = 2629200.

The previous prime is 2666819. The next prime is 2666861. The reversal of 2666831 is 1386662.

2666831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2666831 - 2¹⁸ = 2404687 is a prime.

It is a super-2 number, since 2×2666831² = 14223975165122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18710 + ... + 18851.

It is an arithmetic number, because the mean of its divisors is an integer number (676116).

2^2666831 is an apocalyptic number.

2666831 is a deficient number, since it is larger than the sum of its proper divisors (37633).

2666831 is an equidigital number, since it uses as much as digits as its factorization.

2666831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37632.

The product of its digits is 10368, while the sum is 32.

The square root of 2666831 is about 1633.0434776821. The cubic root of 2666831 is about 138.6751033709.

The spelling of 2666831 in words is "two million, six hundred sixty-six thousand, eight hundred thirty-one".