66546061105 has 4 divisors (see below), whose sum is σ = 79855273332. Its totient is φ = 53236848880.

The previous prime is 66546061093. The next prime is 66546061121. The reversal of 66546061105 is 50116064566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50369273761 + 16176787344 = 224431^2 + 127188^2 .

It is not a de Polignac number, because 66546061105 - 2¹¹ = 66546059057 is a prime.

It is a Duffinian number.

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, 6654606106 + ... + 6654606115.

It is an arithmetic number, because the mean of its divisors is an integer number (19963818333).

Almost surely, 2^66546061105 is an apocalyptic number.

It is an amenable number.

66546061105 is a deficient number, since it is larger than the sum of its proper divisors (13309212227).

66546061105 is a wasteful number, since it uses less digits than its factorization.

66546061105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13309212226.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 66546061105 in words is "sixty-six billion, five hundred forty-six million, sixty-one thousand, one hundred five".