14066564621 has 4 divisors (see below), whose sum is σ = 14156160732. Its totient is φ = 13976968512.

The previous prime is 14066564599. The next prime is 14066564639. The reversal of 14066564621 is 12646566041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4862272900 + 9204291721 = 69730^2 + 95939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14066564621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14066564021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44797820 + ... + 44798133.

It is an arithmetic number, because the mean of its divisors is an integer number (3539040183).

Almost surely, 2^14066564621 is an apocalyptic number.

It is an amenable number.

14066564621 is a deficient number, since it is larger than the sum of its proper divisors (89596111).

14066564621 is an equidigital number, since it uses as much as digits as its factorization.

14066564621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89596110.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 14066564621 in words is "fourteen billion, sixty-six million, five hundred sixty-four thousand, six hundred twenty-one".