1660120107155 has 8 divisors (see below), whose sum is σ = 2004073136352. Its totient is φ = 1320143413888.

The previous prime is 1660120107137. The next prime is 1660120107221. The reversal of 1660120107155 is 5517010210661.

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

It is a cyclic number.

It is not a de Polignac number, because 1660120107155 - 2¹⁰ = 1660120106131 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 994083062 + ... + 994084731.

It is an arithmetic number, because the mean of its divisors is an integer number (250509142044).

Almost surely, 2^{1660120107155} is an apocalyptic number.

1660120107155 is a deficient number, since it is larger than the sum of its proper divisors (343953029197).

1660120107155 is a wasteful number, since it uses less digits than its factorization.

1660120107155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1988167965.

The product of its (nonzero) digits is 12600, while the sum is 35.

The spelling of 1660120107155 in words is "one trillion, six hundred sixty billion, one hundred twenty million, one hundred seven thousand, one hundred fifty-five".