2740663 has 4 divisors (see below), whose sum is σ = 2760520. Its totient is φ = 2720808.

The previous prime is 2740649. The next prime is 2740667. The reversal of 2740663 is 3660472.

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

It is a cyclic number.

It is not a de Polignac number, because 2740663 - 2⁵ = 2740631 is a prime.

It is a super-2 number, since 2×2740663² = 15022467359138, 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 (2740667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9720 + ... + 9997.

It is an arithmetic number, because the mean of its divisors is an integer number (690130).

2^2740663 is an apocalyptic number.

2740663 is a deficient number, since it is larger than the sum of its proper divisors (19857).

2740663 is a wasteful number, since it uses less digits than its factorization.

2740663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19856.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 2740663 is about 1655.4947900854. The cubic root of 2740663 is about 139.9432252784.

It can be divided in two parts, 2740 and 663, that added together give a triangular number (3403 = T₈₂).

The spelling of 2740663 in words is "two million, seven hundred forty thousand, six hundred sixty-three".