6678388 has 6 divisors (see below), whose sum is σ = 11687186. Its totient is φ = 3339192.

The previous prime is 6678383. The next prime is 6678401. The reversal of 6678388 is 8838766.

It can be written as a sum of positive squares in only one way, i.e., 6666724 + 11664 = 2582^2 + 108^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6678383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834795 + ... + 834802.

Almost surely, 2^6678388 is an apocalyptic number.

It is an amenable number.

6678388 is a deficient number, since it is larger than the sum of its proper divisors (5008798).

6678388 is a wasteful number, since it uses less digits than its factorization.

6678388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669601 (or 1669599 counting only the distinct ones).

The product of its digits is 387072, while the sum is 46.

The square root of 6678388 is about 2584.2577270853. The cubic root of 6678388 is about 188.3174431647.

The spelling of 6678388 in words is "six million, six hundred seventy-eight thousand, three hundred eighty-eight".