6691456217 has 8 divisors (see below), whose sum is σ = 6984332160. Its totient is φ = 6398742240.

The previous prime is 6691456193. The next prime is 6691456229. The reversal of 6691456217 is 7126541966.

6691456217 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6691456217 - 2⁸ = 6691455961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6691456297) 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, 48092 + ... + 125282.

It is an arithmetic number, because the mean of its divisors is an integer number (873041520).

Almost surely, 2^6691456217 is an apocalyptic number.

It is an amenable number.

6691456217 is a deficient number, since it is larger than the sum of its proper divisors (292875943).

6691456217 is a wasteful number, since it uses less digits than its factorization.

6691456217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80983.

The product of its digits is 544320, while the sum is 47.

The square root of 6691456217 is about 81801.3216091281. The cubic root of 6691456217 is about 1884.4019582850.

The spelling of 6691456217 in words is "six billion, six hundred ninety-one million, four hundred fifty-six thousand, two hundred seventeen".