3661724725 has 12 divisors (see below), whose sum is σ = 4541367940. Its totient is φ = 2928844800.

The previous prime is 3661724723. The next prime is 3661724753. The reversal of 3661724725 is 5274271663.

3661724725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 358004241 + 3303720484 = 18921^2 + 57478^2 .

It is not a de Polignac number, because 3661724725 - 2¹ = 3661724723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3661724723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182491 + ... + 201559.

Almost surely, 2^3661724725 is an apocalyptic number.

It is an amenable number.

3661724725 is a deficient number, since it is larger than the sum of its proper divisors (879643215).

3661724725 is a wasteful number, since it uses less digits than its factorization.

3661724725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26760 (or 26755 counting only the distinct ones).

The product of its digits is 423360, while the sum is 43.

The square root of 3661724725 is about 60512.1865825389. The cubic root of 3661724725 is about 1541.3285781471.

The spelling of 3661724725 in words is "three billion, six hundred sixty-one million, seven hundred twenty-four thousand, seven hundred twenty-five".