11661066521061 has 8 divisors (see below), whose sum is σ = 15548143274784. Its totient is φ = 7774017057360.

The previous prime is 11661066521033. The next prime is 11661066521119. The reversal of 11661066521061 is 16012566016611.

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

It is not a de Polignac number, because 11661066521061 - 2⁵ = 11661066521029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661066521261) 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, 5803735 + ... + 7550196.

It is an arithmetic number, because the mean of its divisors is an integer number (1943517909348).

Almost surely, 2^{11661066521061} is an apocalyptic number.

It is an amenable number.

11661066521061 is a deficient number, since it is larger than the sum of its proper divisors (3887076753723).

11661066521061 is a wasteful number, since it uses less digits than its factorization.

11661066521061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13645011.

The product of its (nonzero) digits is 77760, while the sum is 42.

The spelling of 11661066521061 in words is "eleven trillion, six hundred sixty-one billion, sixty-six million, five hundred twenty-one thousand, sixty-one".