120666515 has 4 divisors (see below), whose sum is σ = 144799824. Its totient is φ = 96533208.

The previous prime is 120666503. The next prime is 120666529. The reversal of 120666515 is 515666021.

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

It is a cyclic number.

It is not a de Polignac number, because 120666515 - 2⁴ = 120666499 is a prime.

It is a Duffinian number.

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, 12066647 + ... + 12066656.

It is an arithmetic number, because the mean of its divisors is an integer number (36199956).

Almost surely, 2^120666515 is an apocalyptic number.

120666515 is a deficient number, since it is larger than the sum of its proper divisors (24133309).

120666515 is an equidigital number, since it uses as much as digits as its factorization.

120666515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24133308.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 120666515 is about 10984.8311320657. The cubic root of 120666515 is about 494.1539334082.

It can be divided in two parts, 12066 and 6515, that added together give a palindrome (18581).

The spelling of 120666515 in words is "one hundred twenty million, six hundred sixty-six thousand, five hundred fifteen".