6420678 has 16 divisors (see below), whose sum is σ = 14008896. Its totient is φ = 1945640.

The previous prime is 6420599. The next prime is 6420683. The reversal of 6420678 is 8760246.

6420678 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48576 + ... + 48707.

It is an arithmetic number, because the mean of its divisors is an integer number (875556).

Almost surely, 2^6420678 is an apocalyptic number.

6420678 is an abundant number, since it is smaller than the sum of its proper divisors (7588218).

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

6420678 is a wasteful number, since it uses less digits than its factorization.

6420678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97299.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 6420678 is about 2533.9056809597. The cubic root of 6420678 is about 185.8632941610.

The spelling of 6420678 in words is "six million, four hundred twenty thousand, six hundred seventy-eight".