7668551213 has 4 divisors (see below), whose sum is σ = 7747608540. Its totient is φ = 7589493888.

The previous prime is 7668551207. The next prime is 7668551237. The reversal of 7668551213 is 3121558667.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3121558667 = 1321 ⋅2363027.

It can be written as a sum of positive squares in 2 ways, for example, as 1684445764 + 5984105449 = 41042^2 + 77357^2 .

It is a cyclic number.

It is not a de Polignac number, because 7668551213 - 2⁴ = 7668551197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7668551413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39528518 + ... + 39528711.

It is an arithmetic number, because the mean of its divisors is an integer number (1936902135).

Almost surely, 2^7668551213 is an apocalyptic number.

It is an amenable number.

7668551213 is a deficient number, since it is larger than the sum of its proper divisors (79057327).

7668551213 is an equidigital number, since it uses as much as digits as its factorization.

7668551213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79057326.

The product of its digits is 302400, while the sum is 44.

The square root of 7668551213 is about 87570.2644337677. The cubic root of 7668551213 is about 1971.9887852052.

The spelling of 7668551213 in words is "seven billion, six hundred sixty-eight million, five hundred fifty-one thousand, two hundred thirteen".