2120610660 has 96 divisors (see below), whose sum is σ = 6821375232. Its totient is φ = 482181120.

The previous prime is 2120610643. The next prime is 2120610677. The reversal of 2120610660 is 660160212.

It is an interprime number because it is at equal distance from previous prime (2120610643) and next prime (2120610677).

It is a self number, because there is not a number n which added to its sum of digits gives 2120610660.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67980 + ... + 94140.

It is an arithmetic number, because the mean of its divisors is an integer number (71055992).

Almost surely, 2^2120610660 is an apocalyptic number.

2120610660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2120610660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3410687616).

2120610660 is an abundant number, since it is smaller than the sum of its proper divisors (4700764572).

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

2120610660 is a wasteful number, since it uses less digits than its factorization.

2120610660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26373 (or 26371 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 2120610660 is about 46050.0885992633. The cubic root of 2120610660 is about 1284.7549907091.

Adding to 2120610660 its reverse (660160212), we get a palindrome (2780770872).

The spelling of 2120610660 in words is "two billion, one hundred twenty million, six hundred ten thousand, six hundred sixty".