6718888157 has 2 divisors, whose sum is σ = 6718888158. Its totient is φ = 6718888156.

The previous prime is 6718888153. The next prime is 6718888177. The reversal of 6718888157 is 7518888176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4977161401 + 1741726756 = 70549^2 + 41734^2 .

It is a cyclic number.

It is not a de Polignac number, because 6718888157 - 2² = 6718888153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6718888096 and 6718888105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6718888151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3359444078 + 3359444079.

It is an arithmetic number, because the mean of its divisors is an integer number (3359444079).

Almost surely, 2^6718888157 is an apocalyptic number.

It is an amenable number.

6718888157 is a deficient number, since it is larger than the sum of its proper divisors (1).

6718888157 is an equidigital number, since it uses as much as digits as its factorization.

6718888157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6021120, while the sum is 59.

The square root of 6718888157 is about 81968.8242992420. The cubic root of 6718888157 is about 1886.9735122786.

The spelling of 6718888157 in words is "six billion, seven hundred eighteen million, eight hundred eighty-eight thousand, one hundred fifty-seven".