61005605566 has 16 divisors (see below), whose sum is σ = 91613923200. Its totient is φ = 30467652768.

The previous prime is 61005605497. The next prime is 61005605569. The reversal of 61005605566 is 66550650016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61005605569) 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, 12736300 + ... + 12741088.

It is an arithmetic number, because the mean of its divisors is an integer number (5725870200).

Almost surely, 2^61005605566 is an apocalyptic number.

61005605566 is a deficient number, since it is larger than the sum of its proper divisors (30608317634).

61005605566 is a wasteful number, since it uses less digits than its factorization.

61005605566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10803.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 61005605566 in words is "sixty-one billion, five million, six hundred five thousand, five hundred sixty-six".