7968656387 has 8 divisors (see below), whose sum is σ = 8100207360. Its totient is φ = 7837642120.

The previous prime is 7968656369. The next prime is 7968656389. The reversal of 7968656387 is 7836568697.

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 7968656387 - 2¹⁰ = 7968655363 is a prime.

It is a super-2 number, since 2×7968656387² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7968656389) 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, 104183 + ... + 163680.

It is an arithmetic number, because the mean of its divisors is an integer number (1012525920).

Almost surely, 2^7968656387 is an apocalyptic number.

7968656387 is a deficient number, since it is larger than the sum of its proper divisors (131550973).

7968656387 is a wasteful number, since it uses less digits than its factorization.

7968656387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268353.

The product of its digits is 91445760, while the sum is 65.

The square root of 7968656387 is about 89267.3310175677. The cubic root of 7968656387 is about 1997.3846136179.

The spelling of 7968656387 in words is "seven billion, nine hundred sixty-eight million, six hundred fifty-six thousand, three hundred eighty-seven".