7661676647 has 2 divisors, whose sum is σ = 7661676648. Its totient is φ = 7661676646.

The previous prime is 7661676623. The next prime is 7661676689. The reversal of 7661676647 is 7466761667.

It is a weak prime.

It is an emirp because it is prime and its reverse (7466761667) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7661676647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7661676592 and 7661676601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7661670647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3830838323 + 3830838324.

It is an arithmetic number, because the mean of its divisors is an integer number (3830838324).

Almost surely, 2^7661676647 is an apocalyptic number.

7661676647 is a deficient number, since it is larger than the sum of its proper divisors (1).

7661676647 is an equidigital number, since it uses as much as digits as its factorization.

7661676647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10668672, while the sum is 56.

The square root of 7661676647 is about 87531.0039186116. The cubic root of 7661676647 is about 1971.3993379210.

The spelling of 7661676647 in words is "seven billion, six hundred sixty-one million, six hundred seventy-six thousand, six hundred forty-seven".