1966375161 has 48 divisors (see below), whose sum is σ = 2953903680. Its totient is φ = 1259913600.

The previous prime is 1966375157. The next prime is 1966375183. The reversal of 1966375161 is 1615736691.

1966375161 is a `hidden beast` number, since 1 + 9 + 6 + 637 + 5 + 1 + 6 + 1 = 666.

It is not a de Polignac number, because 1966375161 - 2² = 1966375157 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1966365161) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5054755 + ... + 5055143.

It is an arithmetic number, because the mean of its divisors is an integer number (61539660).

Almost surely, 2^1966375161 is an apocalyptic number.

It is an amenable number.

1966375161 is a deficient number, since it is larger than the sum of its proper divisors (987528519).

1966375161 is a wasteful number, since it uses less digits than its factorization.

1966375161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646 (or 643 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 1966375161 is about 44343.8288942216. The cubic root of 1966375161 is about 1252.8203328058.

The spelling of 1966375161 in words is "one billion, nine hundred sixty-six million, three hundred seventy-five thousand, one hundred sixty-one".