120013666 has 4 divisors (see below), whose sum is σ = 180020502. Its totient is φ = 60006832.

The previous prime is 120013637. The next prime is 120013667. The reversal of 120013666 is 666310021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 68475625 + 51538041 = 8275^2 + 7179^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 120013666.

It is not an unprimeable number, because it can be changed into a prime (120013667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30003415 + ... + 30003418.

Almost surely, 2^120013666 is an apocalyptic number.

120013666 is a deficient number, since it is larger than the sum of its proper divisors (60006836).

120013666 is an equidigital number, since it uses as much as digits as its factorization.

120013666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60006835.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 120013666 is about 10955.0748970511. The cubic root of 120013666 is about 493.2611381855.

Adding to 120013666 its reverse (666310021), we get a palindrome (786323687).

The spelling of 120013666 in words is "one hundred twenty million, thirteen thousand, six hundred sixty-six".