6721267217 has 16 divisors (see below), whose sum is σ = 7725619200. Its totient is φ = 5728015440.

The previous prime is 6721267211. The next prime is 6721267247. The reversal of 6721267217 is 7127621276.

It is not a de Polignac number, because 6721267217 - 2²⁶ = 6654158353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6721267211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2153384 + ... + 2156502.

It is an arithmetic number, because the mean of its divisors is an integer number (482851200).

Almost surely, 2^6721267217 is an apocalyptic number.

It is an amenable number.

6721267217 is a deficient number, since it is larger than the sum of its proper divisors (1004351983).

6721267217 is a wasteful number, since it uses less digits than its factorization.

6721267217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4796.

The product of its digits is 98784, while the sum is 41.

The square root of 6721267217 is about 81983.3349955953. The cubic root of 6721267217 is about 1887.1962025684.

The spelling of 6721267217 in words is "six billion, seven hundred twenty-one million, two hundred sixty-seven thousand, two hundred seventeen".