6678038581 has 8 divisors (see below), whose sum is σ = 6773536440. Its totient is φ = 6583163328.

The previous prime is 6678038579. The next prime is 6678038629. The reversal of 6678038581 is 1858308766.

It can be written as a sum of positive squares in 4 ways, for example, as 5043130225 + 1634908356 = 71015^2 + 40434^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6678038581 - 2¹ = 6678038579 is a prime.

It is a super-2 number, since 2×6678038581² = 89192398578648987122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6678138581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134026 + ... + 176971.

It is an arithmetic number, because the mean of its divisors is an integer number (846692055).

Almost surely, 2^6678038581 is an apocalyptic number.

It is an amenable number.

6678038581 is a deficient number, since it is larger than the sum of its proper divisors (95497859).

6678038581 is a wasteful number, since it uses less digits than its factorization.

6678038581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311303.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The square root of 6678038581 is about 81719.2668897611. The cubic root of 6678038581 is about 1883.1415879726.

The spelling of 6678038581 in words is "six billion, six hundred seventy-eight million, thirty-eight thousand, five hundred eighty-one".