2666849 has 4 divisors (see below), whose sum is σ = 2738964. Its totient is φ = 2594736.

The previous prime is 2666819. The next prime is 2666861. The reversal of 2666849 is 9486662.

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 1210000 + 1456849 = 1100^2 + 1207^2 .

It is not a de Polignac number, because 2666849 - 2¹² = 2662753 is a prime.

It is a super-2 number, since 2×2666849² = 14224167177602, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹³ + 6⁴ + 6⁷ + 6⁷ + 8⁷ + 4⁴ + 9² .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2666809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36002 + ... + 36075.

It is an arithmetic number, because the mean of its divisors is an integer number (684741).

2^2666849 is an apocalyptic number.

It is an amenable number.

2666849 is a deficient number, since it is larger than the sum of its proper divisors (72115).

2666849 is an equidigital number, since it uses as much as digits as its factorization.

2666849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72114.

The product of its digits is 124416, while the sum is 41.

The square root of 2666849 is about 1633.0489888549. The cubic root of 2666849 is about 138.6754153699.

The spelling of 2666849 in words is "two million, six hundred sixty-six thousand, eight hundred forty-nine".