16566426965 has 8 divisors (see below), whose sum is σ = 21686959008. Its totient is φ = 12048310480.

The previous prime is 16566426869. The next prime is 16566426967. The reversal of 16566426965 is 56962466561.

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

It is a de Polignac number, because none of the positive numbers 2^k-16566426965 is a prime.

It is a super-4 number, since 4×16566426965⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 16566426965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16566426967) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 150603827 + ... + 150603936.

It is an arithmetic number, because the mean of its divisors is an integer number (2710869876).

Almost surely, 2^16566426965 is an apocalyptic number.

It is an amenable number.

16566426965 is a deficient number, since it is larger than the sum of its proper divisors (5120532043).

16566426965 is a wasteful number, since it uses less digits than its factorization.

16566426965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301207779.

The product of its digits is 13996800, while the sum is 56.

The spelling of 16566426965 in words is "sixteen billion, five hundred sixty-six million, four hundred twenty-six thousand, nine hundred sixty-five".