5605666641 has 63 divisors (see below), whose sum is σ = 8735296441. Its totient is φ = 3595604904.

The previous prime is 5605666639. The next prime is 5605666687. The reversal of 5605666641 is 1466665065.

The square root of 5605666641 is 74871.

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

It is not a de Polignac number, because 5605666641 - 2¹ = 5605666639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5605666601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 95011270 + ... + 95011328.

Almost surely, 2^5605666641 is an apocalyptic number.

5605666641 is the 74871-st square number.

5605666641 is the 37436-th centered octagonal number.

It is an amenable number.

5605666641 is a deficient number, since it is larger than the sum of its proper divisors (3129629800).

5605666641 is an frugal number, since it uses more digits than its factorization.

5605666641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The cubic root of 5605666641 is about 1776.4067817079.

The spelling of 5605666641 in words is "five billion, six hundred five million, six hundred sixty-six thousand, six hundred forty-one".