2120178366 has 48 divisors (see below), whose sum is σ = 4818325824. Its totient is φ = 672985152.

The previous prime is 2120178353. The next prime is 2120178377. The reversal of 2120178366 is 6638710212.

2120178366 is a `hidden beast` number, since 2 + 120 + 178 + 366 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2120178366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2565 + ... + 65168.

It is an arithmetic number, because the mean of its divisors is an integer number (100381788).

Almost surely, 2^2120178366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2120178366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2409162912).

2120178366 is an abundant number, since it is smaller than the sum of its proper divisors (2698147458).

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

2120178366 is a wasteful number, since it uses less digits than its factorization.

2120178366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67825 (or 67822 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 2120178366 is about 46045.3946231325. The cubic root of 2120178366 is about 1284.6676841566.

Adding to 2120178366 its reverse (6638710212), we get a palindrome (8758888578).

The spelling of 2120178366 in words is "two billion, one hundred twenty million, one hundred seventy-eight thousand, three hundred sixty-six".