120666506 has 16 divisors (see below), whose sum is σ = 188065800. Its totient is φ = 57996288.

The previous prime is 120666503. The next prime is 120666529. The reversal of 120666506 is 605666021.

It can be written as a sum of positive squares in 4 ways, for example, as 54390625 + 66275881 = 7375^2 + 8141^2 .

It is not an unprimeable number, because it can be changed into a prime (120666503) 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 in 7 ways as a sum of consecutive naturals, for example, 9050 + ... + 17978.

Almost surely, 2^120666506 is an apocalyptic number.

120666506 is a deficient number, since it is larger than the sum of its proper divisors (67399294).

120666506 is a wasteful number, since it uses less digits than its factorization.

120666506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9193.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 120666506 is about 10984.8307224099. The cubic root of 120666506 is about 494.1539211226.

The spelling of 120666506 in words is "one hundred twenty million, six hundred sixty-six thousand, five hundred six".