6610616566 has 16 divisors (see below), whose sum is σ = 10566097056. Its totient is φ = 3091061376.

The previous prime is 6610616557. The next prime is 6610616569. The reversal of 6610616566 is 6656160166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6610616569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613866 + ... + 624541.

It is an arithmetic number, because the mean of its divisors is an integer number (660381066).

Almost surely, 2^6610616566 is an apocalyptic number.

6610616566 is a deficient number, since it is larger than the sum of its proper divisors (3955480490).

6610616566 is a wasteful number, since it uses less digits than its factorization.

6610616566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238583.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 6610616566 is about 81305.6982381924. The cubic root of 6610616566 is about 1876.7826900552.

The spelling of 6610616566 in words is "six billion, six hundred ten million, six hundred sixteen thousand, five hundred sixty-six".