2666797 has 4 divisors (see below), whose sum is σ = 3047776. Its totient is φ = 2285820.

The previous prime is 2666791. The next prime is 2666809. The reversal of 2666797 is 7976662.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7976662 = 2 ⋅3988331.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2666797 is a prime.

It is a super-2 number, since 2×2666797² = 14223612478418, 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 (2666791) 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, 190479 + ... + 190492.

It is an arithmetic number, because the mean of its divisors is an integer number (761944).

2^2666797 is an apocalyptic number.

It is an amenable number.

2666797 is a deficient number, since it is larger than the sum of its proper divisors (380979).

2666797 is an equidigital number, since it uses as much as digits as its factorization.

2666797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380978.

The product of its digits is 190512, while the sum is 43.

The square root of 2666797 is about 1633.0330676383. The cubic root of 2666797 is about 138.6745140355.

The spelling of 2666797 in words is "two million, six hundred sixty-six thousand, seven hundred ninety-seven".