3666666136444 has 24 divisors (see below), whose sum is σ = 6418802976768. Its totient is φ = 1832722556400.

The previous prime is 3666666136421. The next prime is 3666666136451. The reversal of 3666666136444 is 4446316666663.

It is a happy number.

It is a super-2 number, since 2×3666666136444² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211314369 + ... + 211331719.

It is an arithmetic number, because the mean of its divisors is an integer number (267450124032).

Almost surely, 2^{3666666136444} is an apocalyptic number.

It is an amenable number.

3666666136444 is a deficient number, since it is larger than the sum of its proper divisors (2752136840324).

3666666136444 is a wasteful number, since it uses less digits than its factorization.

3666666136444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31905 (or 31903 counting only the distinct ones).

The product of its digits is 161243136, while the sum is 61.

The spelling of 3666666136444 in words is "three trillion, six hundred sixty-six billion, six hundred sixty-six million, one hundred thirty-six thousand, four hundred forty-four".