3556616166644 has 12 divisors (see below), whose sum is σ = 6281179928100. Its totient is φ = 1761993330048.

The previous prime is 3556616166557. The next prime is 3556616166647. The reversal of 3556616166644 is 4466616166553.

It can be written as a sum of positive squares in 2 ways, for example, as 1489893654544 + 2066722512100 = 1220612^2 + 1437610^2 .

It is a super-2 number, since 2×3556616166644² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3556616166647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4078687829 + ... + 4078688700.

It is an arithmetic number, because the mean of its divisors is an integer number (523431660675).

Almost surely, 2^{3556616166644} is an apocalyptic number.

It is an amenable number.

3556616166644 is a deficient number, since it is larger than the sum of its proper divisors (2724563761456).

3556616166644 is a wasteful number, since it uses less digits than its factorization.

3556616166644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8157376642 (or 8157376640 counting only the distinct ones).

The product of its digits is 55987200, while the sum is 59.

Subtracting 3556616166644 from its reverse (4466616166553), we obtain a palindrome (909999999909).

The spelling of 3556616166644 in words is "three trillion, five hundred fifty-six billion, six hundred sixteen million, one hundred sixty-six thousand, six hundred forty-four".