3666623156604 has 96 divisors (see below), whose sum is σ = 9597324844800. Its totient is φ = 1210483154880.

The previous prime is 3666623156591. The next prime is 3666623156611. The reversal of 3666623156604 is 4066513266663.

It is a happy number.

It is a super-2 number, since 2×3666623156604² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 31 ways as a sum of consecutive naturals, for example, 28317699 + ... + 28446885.

It is an arithmetic number, because the mean of its divisors is an integer number (99972133800).

Almost surely, 2^{3666623156604} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3666623156604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4798662422400).

3666623156604 is an abundant number, since it is smaller than the sum of its proper divisors (5930701688196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3666623156604 is a wasteful number, since it uses less digits than its factorization.

3666623156604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131720 (or 131712 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 54.

The spelling of 3666623156604 in words is "three trillion, six hundred sixty-six billion, six hundred twenty-three million, one hundred fifty-six thousand, six hundred four".