2798666 has 8 divisors (see below), whose sum is σ = 4520964. Its totient is φ = 1291680.

The previous prime is 2798651. The next prime is 2798669. The reversal of 2798666 is 6668972.

It can be written as a sum of positive squares in 2 ways, for example, as 2468041 + 330625 = 1571^2 + 575^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2798669) 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, 53795 + ... + 53846.

2^2798666 is an apocalyptic number.

2798666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2798666 is a deficient number, since it is larger than the sum of its proper divisors (1722298).

2798666 is a wasteful number, since it uses less digits than its factorization.

2798666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107656.

The product of its digits is 217728, while the sum is 44.

The square root of 2798666 is about 1672.9213968385. The cubic root of 2798666 is about 140.9235875225.

The spelling of 2798666 in words is "two million, seven hundred ninety-eight thousand, six hundred sixty-six".