6618652641 has 40 divisors (see below), whose sum is σ = 10461892320. Its totient is φ = 4158355968.

The previous prime is 6618652501. The next prime is 6618652643. The reversal of 6618652641 is 1462568166.

6618652641 is a `hidden beast` number, since 6 + 6 + 1 + 86 + 526 + 41 = 666.

It is not a de Polignac number, because 6618652641 - 2²¹ = 6616555489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6618652643) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 285886 + ... + 308168.

It is an arithmetic number, because the mean of its divisors is an integer number (261547308).

Almost surely, 2^6618652641 is an apocalyptic number.

It is an amenable number.

6618652641 is a deficient number, since it is larger than the sum of its proper divisors (3843239679).

6618652641 is a wasteful number, since it uses less digits than its factorization.

6618652641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22507 (or 22498 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 6618652641 is about 81355.1021202727. The cubic root of 6618652641 is about 1877.5428742759.

The spelling of 6618652641 in words is "six billion, six hundred eighteen million, six hundred fifty-two thousand, six hundred forty-one".