6616902207556 has 81 divisors (see below), whose sum is σ = 12334989352959. Its totient is φ = 3105383340816.

The previous prime is 6616902207511. The next prime is 6616902207581. The reversal of 6616902207556 is 6557022096166.

The square root of 6616902207556 is 2572334.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×6616902207556² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6616902207497 and 6616902207506.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 13587067945 + ... + 13587068431.

Almost surely, 2^{6616902207556} is an apocalyptic number.

6616902207556 is the 2572334-th square number.

It is an amenable number.

6616902207556 is a deficient number, since it is larger than the sum of its proper divisors (5718087145403).

6616902207556 is an equidigital number, since it uses as much as digits as its factorization.

6616902207556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294 (or 647 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 55.

The spelling of 6616902207556 in words is "six trillion, six hundred sixteen billion, nine hundred two million, two hundred seven thousand, five hundred fifty-six".