20120666 has 8 divisors (see below), whose sum is σ = 30293184. Its totient is φ = 10022940.

The previous prime is 20120657. The next prime is 20120713. The reversal of 20120666 is 66602102.

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

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, 18020 + ... + 19103.

It is an arithmetic number, because the mean of its divisors is an integer number (3786648).

Almost surely, 2^20120666 is an apocalyptic number.

20120666 is a deficient number, since it is larger than the sum of its proper divisors (10172518).

20120666 is a wasteful number, since it uses less digits than its factorization.

20120666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37396.

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

The square root of 20120666 is about 4485.6065364675. The cubic root of 20120666 is about 271.9865639989.

Adding to 20120666 its reverse (66602102), we get a palindrome (86722768).

The spelling of 20120666 in words is "twenty million, one hundred twenty thousand, six hundred sixty-six".