6655820 has 12 divisors (see below), whose sum is σ = 13977264. Its totient is φ = 2662320.

The previous prime is 6655801. The next prime is 6655837. The reversal of 6655820 is 285566.

It is a happy number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166376 + ... + 166415.

It is an arithmetic number, because the mean of its divisors is an integer number (1164772).

Almost surely, 2^6655820 is an apocalyptic number.

It is an amenable number.

6655820 is an abundant number, since it is smaller than the sum of its proper divisors (7321444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6655820 is a wasteful number, since it uses less digits than its factorization.

6655820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332800 (or 332798 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 6655820 is about 2579.8875944506. The cubic root of 6655820 is about 188.1050793283.

The spelling of 6655820 in words is "six million, six hundred fifty-five thousand, eight hundred twenty".