6611605556 has 6 divisors (see below), whose sum is σ = 11570309730. Its totient is φ = 3305802776.

The previous prime is 6611605543. The next prime is 6611605657. The reversal of 6611605556 is 6555061166.

It can be written as a sum of positive squares in only one way, i.e., 5758381456 + 853224100 = 75884^2 + 29210^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 826450691 + ... + 826450698.

It is an arithmetic number, because the mean of its divisors is an integer number (1928384955).

Almost surely, 2^6611605556 is an apocalyptic number.

It is an amenable number.

6611605556 is a deficient number, since it is larger than the sum of its proper divisors (4958704174).

6611605556 is a wasteful number, since it uses less digits than its factorization.

6611605556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652901393 (or 1652901391 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 6611605556 is about 81311.7799337833. The cubic root of 6611605556 is about 1876.8762782371.

The spelling of 6611605556 in words is "six billion, six hundred eleven million, six hundred five thousand, five hundred fifty-six".