2766563 has 4 divisors (see below), whose sum is σ = 2929320. Its totient is φ = 2603808.

The previous prime is 2766551. The next prime is 2766581. The reversal of 2766563 is 3656672.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2766563 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 7⁴ + 6² + 6³ + 5⁹ + 6⁷ + 3⁸ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2766583) 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, 81353 + ... + 81386.

It is an arithmetic number, because the mean of its divisors is an integer number (732330).

2^2766563 is an apocalyptic number.

2766563 is a deficient number, since it is larger than the sum of its proper divisors (162757).

2766563 is a wasteful number, since it uses less digits than its factorization.

2766563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162756.

The product of its digits is 45360, while the sum is 35.

The square root of 2766563 is about 1663.2988306375. The cubic root of 2766563 is about 140.3826775218.

The spelling of 2766563 in words is "two million, seven hundred sixty-six thousand, five hundred sixty-three".