7668915858 has 18 divisors (see below), whose sum is σ = 16616789397. Its totient is φ = 2556181440.

The previous prime is 7668915853. The next prime is 7668915871. The reversal of 7668915858 is 8585198667.

It can be written as a sum of positive squares in 2 ways, for example, as 6618961449 + 1049954409 = 81357^2 + 32403^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=61923.

It is a junction number, because it is equal to n+sod(n) for n = 7668915795 and 7668915804.

It is not an unprimeable number, because it can be changed into a prime (7668915851) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 361218 + ... + 381858.

Almost surely, 2^7668915858 is an apocalyptic number.

7668915858 is an abundant number, since it is smaller than the sum of its proper divisors (8947873539).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7668915858 is an frugal number, since it uses more digits than its factorization.

7668915858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41290 (or 20646 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 63.

The square root of 7668915858 is about 87572.3464228292. The cubic root of 7668915858 is about 1972.0200411940.

The spelling of 7668915858 in words is "seven billion, six hundred sixty-eight million, nine hundred fifteen thousand, eight hundred fifty-eight".