6688313215 has 16 divisors (see below), whose sum is σ = 8504363520. Its totient is φ = 5035456800.

The previous prime is 6688313201. The next prime is 6688313227. The reversal of 6688313215 is 5123138866.

6688313215 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6688313215 - 2²¹ = 6686216063 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218779 + ... + 247468.

It is an arithmetic number, because the mean of its divisors is an integer number (531522720).

Almost surely, 2^6688313215 is an apocalyptic number.

6688313215 is a deficient number, since it is larger than the sum of its proper divisors (1816050305).

6688313215 is a wasteful number, since it uses less digits than its factorization.

6688313215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466422.

The product of its digits is 207360, while the sum is 43.

The square root of 6688313215 is about 81782.1081594257. The cubic root of 6688313215 is about 1884.1068751981.

The spelling of 6688313215 in words is "six billion, six hundred eighty-eight million, three hundred thirteen thousand, two hundred fifteen".