655911 has 16 divisors (see below), whose sum is σ = 1029600. Its totient is φ = 411264.

The previous prime is 655909. The next prime is 655913. The reversal of 655911 is 119556.

655911 is a `hidden beast` number, since 655 + 9 + 1 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (655909) and next prime (655913).

It is not a de Polignac number, because 655911 - 2¹ = 655909 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256 + ... + 1173.

It is an arithmetic number, because the mean of its divisors is an integer number (64350).

2⁶⁵⁵⁹¹¹ is an apocalyptic number.

655911 is a deficient number, since it is larger than the sum of its proper divisors (373689).

655911 is a wasteful number, since it uses less digits than its factorization.

655911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455 (or 1449 counting only the distinct ones).

The product of its digits is 1350, while the sum is 27.

The square root of 655911 is about 809.8833249302. The cubic root of 655911 is about 86.8857000778.

The spelling of 655911 in words is "six hundred fifty-five thousand, nine hundred eleven".