2655999 has 6 divisors (see below), whose sum is σ = 3836456. Its totient is φ = 1770660.

The previous prime is 2655977. The next prime is 2656009. The reversal of 2655999 is 9995562.

2655999 is a `hidden beast` number, since 2 + 6 + 559 + 99 = 666.

It is not a de Polignac number, because 2655999 - 2¹¹ = 2653951 is a prime.

It is a Duffinian number.

2655999 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2655929) 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 5 ways as a sum of consecutive naturals, for example, 147547 + ... + 147564.

2^2655999 is an apocalyptic number.

2655999 is a deficient number, since it is larger than the sum of its proper divisors (1180457).

2655999 is a wasteful number, since it uses less digits than its factorization.

2655999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295117 (or 295114 counting only the distinct ones).

The product of its digits is 218700, while the sum is 45.

The square root of 2655999 is about 1629.7235961966. The cubic root of 2655999 is about 138.4870940721.

It can be divided in two parts, 265599 and 9, that multiplied together give a triangular number (2390391 = T₂₁₈₆).

The spelling of 2655999 in words is "two million, six hundred fifty-five thousand, nine hundred ninety-nine".