16661155065 has 64 divisors (see below), whose sum is σ = 29215365120. Its totient is φ = 8071557120.

The previous prime is 16661155057. The next prime is 16661155087. The reversal of 16661155065 is 56055116661.

16661155065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16661155065 - 2³ = 16661155057 is a prime.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 3135631 + ... + 3140939.

It is an arithmetic number, because the mean of its divisors is an integer number (456490080).

Almost surely, 2^16661155065 is an apocalyptic number.

16661155065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16661155065 is a deficient number, since it is larger than the sum of its proper divisors (12554210055).

16661155065 is a wasteful number, since it uses less digits than its factorization.

16661155065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5762.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 16661155065 in words is "sixteen billion, six hundred sixty-one million, one hundred fifty-five thousand, sixty-five".