66161656060 has 24 divisors (see below), whose sum is σ = 139032976320. Its totient is φ = 26446853184.

The previous prime is 66161655983. The next prime is 66161656063. The reversal of 66161656060 is 6065616166.

It is a junction number, because it is equal to n+sod(n) for n = 66161655998 and 66161656016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66161656063) 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, 1082595 + ... + 1142074.

It is an arithmetic number, because the mean of its divisors is an integer number (5793040680).

Almost surely, 2^66161656060 is an apocalyptic number.

It is an amenable number.

66161656060 is an abundant number, since it is smaller than the sum of its proper divisors (72871320260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66161656060 is a wasteful number, since it uses less digits than its factorization.

66161656060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226165 (or 2226163 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 66161656060 in words is "sixty-six billion, one hundred sixty-one million, six hundred fifty-six thousand, sixty".