5561656066 has 8 divisors (see below), whose sum is σ = 8343872460. Its totient is φ = 2780365248.

The previous prime is 5561656057. The next prime is 5561656127. The reversal of 5561656066 is 6606561655.

It can be written as a sum of positive squares in 2 ways, for example, as 4285666225 + 1275989841 = 65465^2 + 35721^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216171 + ... + 240526.

Almost surely, 2^5561656066 is an apocalyptic number.

5561656066 is a deficient number, since it is larger than the sum of its proper divisors (2782216394).

5561656066 is a wasteful number, since it uses less digits than its factorization.

5561656066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462788.

The product of its (nonzero) digits is 972000, while the sum is 46.

The square root of 5561656066 is about 74576.5114898786. The cubic root of 5561656066 is about 1771.7456541302.

The spelling of 5561656066 in words is "five billion, five hundred sixty-one million, six hundred fifty-six thousand, sixty-six".