655111678 has 16 divisors (see below), whose sum is σ = 1113955920. Its totient is φ = 286445376.

The previous prime is 655111663. The next prime is 655111693. The reversal of 655111678 is 876111556.

It is an interprime number because it is at equal distance from previous prime (655111663) and next prime (655111693).

It is a self number, because there is not a number n which added to its sum of digits gives 655111678.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 662575 + ... + 663562.

It is an arithmetic number, because the mean of its divisors is an integer number (69622245).

Almost surely, 2^655111678 is an apocalyptic number.

655111678 is a deficient number, since it is larger than the sum of its proper divisors (458844242).

655111678 is a wasteful number, since it uses less digits than its factorization.

655111678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326171.

The product of its digits is 50400, while the sum is 40.

The square root of 655111678 is about 25595.1495014192. The cubic root of 655111678 is about 868.5039148553.

The spelling of 655111678 in words is "six hundred fifty-five million, one hundred eleven thousand, six hundred seventy-eight".