2553866 has 16 divisors (see below), whose sum is σ = 4608960. Its totient is φ = 1036800.

The previous prime is 2553857. The next prime is 2553869. The reversal of 2553866 is 6683552.

It is a super-3 number, since 3×2553866³ = 49970716168033397688, which contains 333 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2553869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4535 + ... + 5066.

It is an arithmetic number, because the mean of its divisors is an integer number (288060).

2^2553866 is an apocalyptic number.

2553866 is a deficient number, since it is larger than the sum of its proper divisors (2055094).

2553866 is a wasteful number, since it uses less digits than its factorization.

2553866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9629.

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

The square root of 2553866 is about 1598.0819753692. The cubic root of 2553866 is about 136.6887280137.

The spelling of 2553866 in words is "two million, five hundred fifty-three thousand, eight hundred sixty-six".