7666668249 has 16 divisors (see below), whose sum is σ = 10660769280. Its totient is φ = 4895239680.

The previous prime is 7666668227. The next prime is 7666668257. The reversal of 7666668249 is 9428666667.

It is not a de Polignac number, because 7666668249 - 2²³ = 7658279641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7666668192 and 7666668201.

It is not an unprimeable number, because it can be changed into a prime (7666668209) 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, 415914 + ... + 433955.

It is an arithmetic number, because the mean of its divisors is an integer number (666298080).

Almost surely, 2^7666668249 is an apocalyptic number.

It is an amenable number.

7666668249 is a deficient number, since it is larger than the sum of its proper divisors (2994101031).

7666668249 is a wasteful number, since it uses less digits than its factorization.

7666668249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850000.

The product of its digits is 31352832, while the sum is 60.

The square root of 7666668249 is about 87559.5126128509. The cubic root of 7666668249 is about 1971.8273688896.

The spelling of 7666668249 in words is "seven billion, six hundred sixty-six million, six hundred sixty-eight thousand, two hundred forty-nine".