6647522601841 has 27 divisors (see below), whose sum is σ = 7467049503417. Its totient is φ = 5913437583240.

The previous prime is 6647522601833. The next prime is 6647522601847. The reversal of 6647522601841 is 1481062257466.

The square root of 6647522601841 is 2578279.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 6647522601841 - 2³ = 6647522601833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6647522601847) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1332967750 + ... + 1332972736.

Almost surely, 2^{6647522601841} is an apocalyptic number.

6647522601841 is the 2578279-th square number.

6647522601841 is the 1289140-th centered octagonal number.

It is an amenable number.

6647522601841 is a deficient number, since it is larger than the sum of its proper divisors (819526901576).

6647522601841 is an frugal number, since it uses more digits than its factorization.

6647522601841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10090 (or 5045 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 6647522601841 in words is "six trillion, six hundred forty-seven billion, five hundred twenty-two million, six hundred one thousand, eight hundred forty-one".