5643341661 has 8 divisors (see below), whose sum is σ = 7525016800. Its totient is φ = 3761947152.

The previous prime is 5643341659. The next prime is 5643341719. The reversal of 5643341661 is 1661433465.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5643341661 - 2¹ = 5643341659 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5643341611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17611 + ... + 107688.

It is an arithmetic number, because the mean of its divisors is an integer number (940627100).

Almost surely, 2^5643341661 is an apocalyptic number.

It is an amenable number.

5643341661 is a deficient number, since it is larger than the sum of its proper divisors (1881675139).

5643341661 is a wasteful number, since it uses less digits than its factorization.

5643341661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140315.

The product of its digits is 155520, while the sum is 39.

The square root of 5643341661 is about 75122.1782232118. The cubic root of 5643341661 is about 1780.3775722417.

The spelling of 5643341661 in words is "five billion, six hundred forty-three million, three hundred forty-one thousand, six hundred sixty-one".