3666544213231 has 8 divisors (see below), whose sum is σ = 3670477092864. Its totient is φ = 3662613338520.

The previous prime is 3666544213219. The next prime is 3666544213243. The reversal of 3666544213231 is 1323124456663.

It is an interprime number because it is at equal distance from previous prime (3666544213219) and next prime (3666544213243).

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

It is a cyclic number.

It is not a de Polignac number, because 3666544213231 - 2⁹ = 3666544212719 is a prime.

It is a super-2 number, since 2×3666544213231² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666544213201) 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, 3172690 + ... + 4171216.

It is an arithmetic number, because the mean of its divisors is an integer number (458809636608).

Almost surely, 2^{3666544213231} is an apocalyptic number.

3666544213231 is a deficient number, since it is larger than the sum of its proper divisors (3932879633).

3666544213231 is a wasteful number, since it uses less digits than its factorization.

3666544213231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002461.

The product of its digits is 1866240, while the sum is 46.

Adding to 3666544213231 its reverse (1323124456663), we get a palindrome (4989668669894).

The spelling of 3666544213231 in words is "three trillion, six hundred sixty-six billion, five hundred forty-four million, two hundred thirteen thousand, two hundred thirty-one".