6678388945 has 8 divisors (see below), whose sum is σ = 8435859840. Its totient is φ = 5061515760.

The previous prime is 6678388943. The next prime is 6678388957. The reversal of 6678388945 is 5498838766.

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

It is not a de Polignac number, because 6678388945 - 2¹ = 6678388943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6678388943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35149321 + ... + 35149510.

It is an arithmetic number, because the mean of its divisors is an integer number (1054482480).

Almost surely, 2^6678388945 is an apocalyptic number.

It is an amenable number.

6678388945 is a deficient number, since it is larger than the sum of its proper divisors (1757470895).

6678388945 is a wasteful number, since it uses less digits than its factorization.

6678388945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70298855.

The product of its digits is 69672960, while the sum is 64.

The square root of 6678388945 is about 81721.4105666318. The cubic root of 6678388945 is about 1883.1745204708.

The spelling of 6678388945 in words is "six billion, six hundred seventy-eight million, three hundred eighty-eight thousand, nine hundred forty-five".