8138480661 has 12 divisors (see below), whose sum is σ = 12005702592. Its totient is φ = 5310214056.

The previous prime is 8138480629. The next prime is 8138480741. The reversal of 8138480661 is 1660848318.

It is a happy number.

8138480661 is a `hidden beast` number, since 81 + 38 + 480 + 6 + 61 = 666.

It is not a de Polignac number, because 8138480661 - 2⁵ = 8138480629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8138480761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9619531 + ... + 9620376.

It is an arithmetic number, because the mean of its divisors is an integer number (1000475216).

Almost surely, 2^8138480661 is an apocalyptic number.

It is an amenable number.

8138480661 is a deficient number, since it is larger than the sum of its proper divisors (3867221931).

8138480661 is a wasteful number, since it uses less digits than its factorization.

8138480661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19239960 (or 19239957 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 8138480661 is about 90213.5281484989. The cubic root of 8138480661 is about 2011.4741016933.

The spelling of 8138480661 in words is "eight billion, one hundred thirty-eight million, four hundred eighty thousand, six hundred sixty-one".