6618356647 has 6 divisors (see below), whose sum is σ = 7698904728. Its totient is φ = 5672877084.

The previous prime is 6618356629. The next prime is 6618356663. The reversal of 6618356647 is 7466538166.

6618356647 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6618356647 - 2¹⁹ = 6617832359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6618356594 and 6618356603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6618356617) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67534203 + ... + 67534300.

It is an arithmetic number, because the mean of its divisors is an integer number (1283150788).

Almost surely, 2^6618356647 is an apocalyptic number.

6618356647 is a deficient number, since it is larger than the sum of its proper divisors (1080548081).

6618356647 is a wasteful number, since it uses less digits than its factorization.

6618356647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135068517 (or 135068510 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 52.

The square root of 6618356647 is about 81353.2829515810. The cubic root of 6618356647 is about 1877.5148852102.

The spelling of 6618356647 in words is "six billion, six hundred eighteen million, three hundred fifty-six thousand, six hundred forty-seven".