7664763217 has 8 divisors (see below), whose sum is σ = 7794072416. Its totient is φ = 7535892672.

The previous prime is 7664763203. The next prime is 7664763263. The reversal of 7664763217 is 7123674667.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7664763217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7664767217) 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, 74328 + ... + 144409.

It is an arithmetic number, because the mean of its divisors is an integer number (974259052).

Almost surely, 2^7664763217 is an apocalyptic number.

It is an amenable number.

7664763217 is a deficient number, since it is larger than the sum of its proper divisors (129309199).

7664763217 is a wasteful number, since it uses less digits than its factorization.

7664763217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219327.

The product of its digits is 1778112, while the sum is 49.

The square root of 7664763217 is about 87548.6334387922. The cubic root of 7664763217 is about 1971.6640339054.

The spelling of 7664763217 in words is "seven billion, six hundred sixty-four million, seven hundred sixty-three thousand, two hundred seventeen".