6648668479 has 2 divisors, whose sum is σ = 6648668480. Its totient is φ = 6648668478.

The previous prime is 6648668449. The next prime is 6648668503. The reversal of 6648668479 is 9748668466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6648668479 - 2¹³ = 6648660287 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6648668479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6648668449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3324334239 + 3324334240.

It is an arithmetic number, because the mean of its divisors is an integer number (3324334240).

Almost surely, 2^6648668479 is an apocalyptic number.

6648668479 is a deficient number, since it is larger than the sum of its proper divisors (1).

6648668479 is an equidigital number, since it uses as much as digits as its factorization.

6648668479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 83607552, while the sum is 64.

The square root of 6648668479 is about 81539.3676637243. The cubic root of 6648668479 is about 1880.3768369956.

The spelling of 6648668479 in words is "six billion, six hundred forty-eight million, six hundred sixty-eight thousand, four hundred seventy-nine".