2120666 has 8 divisors (see below), whose sum is σ = 3348480. Its totient is φ = 1004508.

The previous prime is 2120653. The next prime is 2120693. The reversal of 2120666 is 6660212.

2120666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27866 + ... + 27941.

It is an arithmetic number, because the mean of its divisors is an integer number (418560).

2^2120666 is an apocalyptic number.

2120666 is a deficient number, since it is larger than the sum of its proper divisors (1227814).

2120666 is a wasteful number, since it uses less digits than its factorization.

2120666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55828.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2120666 is about 1456.2506652359. The cubic root of 2120666 is about 128.4766166377.

Adding to 2120666 its reverse (6660212), we get a palindrome (8780878).

The spelling of 2120666 in words is "two million, one hundred twenty thousand, six hundred sixty-six".