6678390 has 16 divisors (see below), whose sum is σ = 16028208. Its totient is φ = 1780896.

The previous prime is 6678383. The next prime is 6678401. The reversal of 6678390 is 938766.

6678390 is nontrivially palindromic in base 14.

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, 111277 + ... + 111336.

It is an arithmetic number, because the mean of its divisors is an integer number (1001763).

Almost surely, 2^6678390 is an apocalyptic number.

6678390 is an abundant number, since it is smaller than the sum of its proper divisors (9349818).

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

6678390 is a wasteful number, since it uses less digits than its factorization.

6678390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222623.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 6678390 is about 2584.2581140436. The cubic root of 6678390 is about 188.3174619634.

The spelling of 6678390 in words is "six million, six hundred seventy-eight thousand, three hundred ninety".