2172477966 has 8 divisors (see below), whose sum is σ = 4344955944. Its totient is φ = 724159320.

The previous prime is 2172477941. The next prime is 2172478001. The reversal of 2172477966 is 6697742712.

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

2172477966 is an admirable number.

It is a Curzon number.

It is a congruent 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, 181039825 + ... + 181039836.

It is an arithmetic number, because the mean of its divisors is an integer number (543119493).

Almost surely, 2^2172477966 is an apocalyptic number.

2172477966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2172477966 is a wasteful number, since it uses less digits than its factorization.

2172477966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362079666.

The product of its digits is 1778112, while the sum is 51.

The square root of 2172477966 is about 46609.8483799293. The cubic root of 2172477966 is about 1295.1451994037.

The spelling of 2172477966 in words is "two billion, one hundred seventy-two million, four hundred seventy-seven thousand, nine hundred sixty-six".