3666582243 has 24 divisors (see below), whose sum is σ = 5335102448. Its totient is φ = 2426490432.

The previous prime is 3666582211. The next prime is 3666582277. The reversal of 3666582243 is 3422856663.

It is a happy number.

It is not a de Polignac number, because 3666582243 - 2⁵ = 3666582211 is a prime.

It is a super-2 number, since 2×3666582243² = 26887650689365822098, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (1244160) is a multiple of the sum of its prime divisors (5760).

It is not an unprimeable number, because it can be changed into a prime (3666580243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 702921 + ... + 708117.

Almost surely, 2^3666582243 is an apocalyptic number.

3666582243 is a deficient number, since it is larger than the sum of its proper divisors (1668520205).

3666582243 is a wasteful number, since it uses less digits than its factorization.

3666582243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5763 (or 5760 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 45.

The square root of 3666582243 is about 60552.3099724527. The cubic root of 3666582243 is about 1542.0098348073.

The spelling of 3666582243 in words is "three billion, six hundred sixty-six million, five hundred eighty-two thousand, two hundred forty-three".