16661120277265 has 16 divisors (see below), whose sum is σ = 20703396003840. Its totient is φ = 12858241152960.

The previous prime is 16661120277257. The next prime is 16661120277281. The reversal of 16661120277265 is 56277202116661.

It is not a de Polignac number, because 16661120277265 - 2³ = 16661120277257 is a prime.

It is a super-3 number, since 3×16661120277265³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169495185 + ... + 169593454.

It is an arithmetic number, because the mean of its divisors is an integer number (1293962250240).

Almost surely, 2^{16661120277265} is an apocalyptic number.

It is an amenable number.

16661120277265 is a deficient number, since it is larger than the sum of its proper divisors (4042275726575).

16661120277265 is a wasteful number, since it uses less digits than its factorization.

16661120277265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339088992.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 16661120277265 in words is "sixteen trillion, six hundred sixty-one billion, one hundred twenty million, two hundred seventy-seven thousand, two hundred sixty-five".