1661160065099 has 8 divisors (see below), whose sum is σ = 1759156043040. Its totient is φ = 1563195273856.

The previous prime is 1661160065077. The next prime is 1661160065113. The reversal of 1661160065099 is 9905600611661.

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

It is not a de Polignac number, because 1661160065099 - 2¹² = 1661160061003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1661160965099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7686959 + ... + 7900104.

It is an arithmetic number, because the mean of its divisors is an integer number (219894505380).

Almost surely, 2^{1661160065099} is an apocalyptic number.

1661160065099 is a deficient number, since it is larger than the sum of its proper divisors (97995977941).

1661160065099 is a wasteful number, since it uses less digits than its factorization.

1661160065099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15593349.

The product of its (nonzero) digits is 524880, while the sum is 50.

The spelling of 1661160065099 in words is "one trillion, six hundred sixty-one billion, one hundred sixty million, sixty-five thousand, ninety-nine".