6691378 has 8 divisors (see below), whose sum is σ = 10093680. Its totient is φ = 3326820.

The previous prime is 6691369. The next prime is 6691397. The reversal of 6691378 is 8731966.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6691378.

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, 8988 + ... + 9703.

It is an arithmetic number, because the mean of its divisors is an integer number (1261710).

Almost surely, 2^6691378 is an apocalyptic number.

6691378 is a deficient number, since it is larger than the sum of its proper divisors (3402302).

6691378 is a wasteful number, since it uses less digits than its factorization.

6691378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18872.

The product of its digits is 54432, while the sum is 40.

The square root of 6691378 is about 2586.7698003495. The cubic root of 6691378 is about 188.4394615945.

The spelling of 6691378 in words is "six million, six hundred ninety-one thousand, three hundred seventy-eight".