3666718441 has 4 divisors (see below), whose sum is σ = 3667961412. Its totient is φ = 3665475472.

The previous prime is 3666718411. The next prime is 3666718481. The reversal of 3666718441 is 1448176663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1448176663 = 25367 ⋅57089.

It can be written as a sum of positive squares in 2 ways, for example, as 508728025 + 3157990416 = 22555^2 + 56196^2 .

It is a cyclic number.

It is not a de Polignac number, because 3666718441 - 2¹¹ = 3666716393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3666718391 and 3666718400.

It is not an unprimeable number, because it can be changed into a prime (3666718411) 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 3 ways as a sum of consecutive naturals, for example, 617050 + ... + 622963.

It is an arithmetic number, because the mean of its divisors is an integer number (916990353).

Almost surely, 2^3666718441 is an apocalyptic number.

It is an amenable number.

3666718441 is a deficient number, since it is larger than the sum of its proper divisors (1242971).

3666718441 is a wasteful number, since it uses less digits than its factorization.

3666718441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242970.

The product of its digits is 580608, while the sum is 46.

The square root of 3666718441 is about 60553.4345929279. The cubic root of 3666718441 is about 1542.0289276156.

The spelling of 3666718441 in words is "three billion, six hundred sixty-six million, seven hundred eighteen thousand, four hundred forty-one".