2855663 has 4 divisors (see below), whose sum is σ = 2859120. Its totient is φ = 2852208.

The previous prime is 2855653. The next prime is 2855683. The reversal of 2855663 is 3665582.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3665582 = 2 ⋅1832791.

It is a cyclic number.

It is not a de Polignac number, because 2855663 - 2⁶ = 2855599 is a prime.

It is a super-2 number, since 2×2855663² = 16309622339138, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁴ + 8⁶ + 5⁶ + 5⁹ + 6⁶ + 6⁶ + 3¹² .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2855603) 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, 323 + ... + 2411.

It is an arithmetic number, because the mean of its divisors is an integer number (714780).

2^2855663 is an apocalyptic number.

2855663 is a deficient number, since it is larger than the sum of its proper divisors (3457).

2855663 is a wasteful number, since it uses less digits than its factorization.

2855663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3456.

The product of its digits is 43200, while the sum is 35.

The square root of 2855663 is about 1689.8707051133. The cubic root of 2855663 is about 141.8738382175.

The spelling of 2855663 in words is "two million, eight hundred fifty-five thousand, six hundred sixty-three".