66089518061 has 16 divisors (see below), whose sum is σ = 78835574784. Its totient is φ = 54170932464.

The previous prime is 66089518051. The next prime is 66089518063. The reversal of 66089518061 is 16081598066.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66089518061 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 (66089518063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 582770 + ... + 686876.

It is an arithmetic number, because the mean of its divisors is an integer number (4927223424).

Almost surely, 2^66089518061 is an apocalyptic number.

It is an amenable number.

66089518061 is a deficient number, since it is larger than the sum of its proper divisors (12746056723).

66089518061 is a wasteful number, since it uses less digits than its factorization.

66089518061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108080.

The product of its (nonzero) digits is 622080, while the sum is 50.

The spelling of 66089518061 in words is "sixty-six billion, eighty-nine million, five hundred eighteen thousand, sixty-one".