2766643 has 4 divisors (see below), whose sum is σ = 3018168. Its totient is φ = 2515120.

The previous prime is 2766637. The next prime is 2766649. The reversal of 2766643 is 3466672.

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

It is an interprime number because it is at equal distance from previous prime (2766637) and next prime (2766649).

It is a cyclic number.

It is not a de Polignac number, because 2766643 - 2⁵ = 2766611 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2766599 and 2766608.

It is not an unprimeable number, because it can be changed into a prime (2766649) 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, 125746 + ... + 125767.

It is an arithmetic number, because the mean of its divisors is an integer number (754542).

2^2766643 is an apocalyptic number.

2766643 is a deficient number, since it is larger than the sum of its proper divisors (251525).

2766643 is a wasteful number, since it uses less digits than its factorization.

2766643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251524.

The product of its digits is 36288, while the sum is 34.

The square root of 2766643 is about 1663.3228790587. The cubic root of 2766643 is about 140.3840306455.

The spelling of 2766643 in words is "two million, seven hundred sixty-six thousand, six hundred forty-three".