61065566111 has 8 divisors (see below), whose sum is σ = 66618795648. Its totient is φ = 55512639000.

The previous prime is 61065566077. The next prime is 61065566117. The reversal of 61065566111 is 11166556016.

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

It is a cyclic number.

It is not a de Polignac number, because 61065566111 - 2¹⁸ = 61065303967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61065566117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646496 + ... + 734906.

It is an arithmetic number, because the mean of its divisors is an integer number (8327349456).

Almost surely, 2^61065566111 is an apocalyptic number.

61065566111 is a deficient number, since it is larger than the sum of its proper divisors (5553229537).

61065566111 is a wasteful number, since it uses less digits than its factorization.

61065566111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151213.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 61065566111 in words is "sixty-one billion, sixty-five million, five hundred sixty-six thousand, one hundred eleven".