2785663 has 4 divisors (see below), whose sum is σ = 2853648. Its totient is φ = 2717680.

The previous prime is 2785649. The next prime is 2785667. The reversal of 2785663 is 3665872.

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 2785663 - 2⁵ = 2785631 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 7³ + 8³ + 5⁹ + 6⁵ + 6⁷ + 3⁹ .

It is a Duffinian number.

2785663 is a lucky number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2785667) 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, 33931 + ... + 34012.

It is an arithmetic number, because the mean of its divisors is an integer number (713412).

2^2785663 is an apocalyptic number.

2785663 is a deficient number, since it is larger than the sum of its proper divisors (67985).

2785663 is an equidigital number, since it uses as much as digits as its factorization.

2785663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67984.

The product of its digits is 60480, while the sum is 37.

The square root of 2785663 is about 1669.0305569402. The cubic root of 2785663 is about 140.7049983011.

The spelling of 2785663 in words is "two million, seven hundred eighty-five thousand, six hundred sixty-three".