66161137929 has 8 divisors (see below), whose sum is σ = 88229833440. Its totient is φ = 44099933856.

The previous prime is 66161137909. The next prime is 66161137963. The reversal of 66161137929 is 92973116166.

66161137929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 66161137929 - 2¹⁵ = 66161105161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66161137909) 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, 1852219 + ... + 1887600.

It is an arithmetic number, because the mean of its divisors is an integer number (11028729180).

Almost surely, 2^66161137929 is an apocalyptic number.

It is an amenable number.

66161137929 is a deficient number, since it is larger than the sum of its proper divisors (22068695511).

66161137929 is a wasteful number, since it uses less digits than its factorization.

66161137929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3745719.

The product of its digits is 734832, while the sum is 51.

The spelling of 66161137929 in words is "sixty-six billion, one hundred sixty-one million, one hundred thirty-seven thousand, nine hundred twenty-nine".