120515111216666 has 8 divisors (see below), whose sum is σ = 185658414577140. Its totient is φ = 58628973024288.

The previous prime is 120515111216663. The next prime is 120515111216671. The reversal of 120515111216666 is 666612111515021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 120452271255625 + 62839961041 = 10975075^2 + 250679^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (120515111216663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 814291291931 + ... + 814291292078.

Almost surely, 2^{120515111216666} is an apocalyptic number.

120515111216666 is a deficient number, since it is larger than the sum of its proper divisors (65143303360474).

120515111216666 is a wasteful number, since it uses less digits than its factorization.

120515111216666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628582584048.

The product of its (nonzero) digits is 129600, while the sum is 44.

The spelling of 120515111216666 in words is "one hundred twenty trillion, five hundred fifteen billion, one hundred eleven million, two hundred sixteen thousand, six hundred sixty-six".