16566426941 has 4 divisors (see below), whose sum is σ = 16566689532. Its totient is φ = 16566164352.

The previous prime is 16566426869. The next prime is 16566426967. The reversal of 16566426941 is 14962466561.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3700288900 + 12866138041 = 60830^2 + 113429^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16566426941 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16566426941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16566426341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26765 + ... + 183981.

It is an arithmetic number, because the mean of its divisors is an integer number (4141672383).

Almost surely, 2^16566426941 is an apocalyptic number.

It is an amenable number.

16566426941 is a deficient number, since it is larger than the sum of its proper divisors (262591).

16566426941 is a wasteful number, since it uses less digits than its factorization.

16566426941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262590.

The product of its digits is 1866240, while the sum is 50.

The spelling of 16566426941 in words is "sixteen billion, five hundred sixty-six million, four hundred twenty-six thousand, nine hundred forty-one".