6655978 has 8 divisors (see below), whose sum is σ = 11410272. Its totient is φ = 2852556.

The previous prime is 6655951. The next prime is 6655997. The reversal of 6655978 is 8795566.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 237700 + ... + 237727.

It is an arithmetic number, because the mean of its divisors is an integer number (1426284).

Almost surely, 2^6655978 is an apocalyptic number.

6655978 is a deficient number, since it is larger than the sum of its proper divisors (4754294).

6655978 is a wasteful number, since it uses less digits than its factorization.

6655978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475436.

The product of its digits is 453600, while the sum is 46.

The square root of 6655978 is about 2579.9182157580. The cubic root of 6655978 is about 188.1065677684.

The spelling of 6655978 in words is "six million, six hundred fifty-five thousand, nine hundred seventy-eight".