6378655 has 16 divisors (see below), whose sum is σ = 8195904. Its totient is φ = 4748800.

The previous prime is 6378629. The next prime is 6378703. The reversal of 6378655 is 5568736.

It is not a de Polignac number, because 6378655 - 2¹⁵ = 6345887 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8214 + ... + 8956.

It is an arithmetic number, because the mean of its divisors is an integer number (512244).

Almost surely, 2^6378655 is an apocalyptic number.

6378655 is a deficient number, since it is larger than the sum of its proper divisors (1817249).

6378655 is a wasteful number, since it uses less digits than its factorization.

6378655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866.

The product of its digits is 151200, while the sum is 40.

The square root of 6378655 is about 2525.5999287298. The cubic root of 6378655 is about 185.4569177999.

The spelling of 6378655 in words is "six million, three hundred seventy-eight thousand, six hundred fifty-five".