4343785661 has 16 divisors (see below), whose sum is σ = 4494087360. Its totient is φ = 4196641920.

The previous prime is 4343785613. The next prime is 4343785697. The reversal of 4343785661 is 1665873434.

It is a cyclic number.

It is not a de Polignac number, because 4343785661 - 2¹⁴ = 4343769277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4343785601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 903881 + ... + 908673.

It is an arithmetic number, because the mean of its divisors is an integer number (280880460).

Almost surely, 2^4343785661 is an apocalyptic number.

It is an amenable number.

4343785661 is a deficient number, since it is larger than the sum of its proper divisors (150301699).

4343785661 is a wasteful number, since it uses less digits than its factorization.

4343785661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5116.

The product of its digits is 1451520, while the sum is 47.

The square root of 4343785661 is about 65907.4021715315. The cubic root of 4343785661 is about 1631.6341849017.

The spelling of 4343785661 in words is "four billion, three hundred forty-three million, seven hundred eighty-five thousand, six hundred sixty-one".