14661221561 has 8 divisors (see below), whose sum is σ = 17296187904. Its totient is φ = 12161381760.

The previous prime is 14661221543. The next prime is 14661221567. The reversal of 14661221561 is 16512216641.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14661221561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14661221567) 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 7 ways as a sum of consecutive naturals, for example, 33781400 + ... + 33781833.

It is an arithmetic number, because the mean of its divisors is an integer number (2162023488).

Almost surely, 2^14661221561 is an apocalyptic number.

It is an amenable number.

14661221561 is a deficient number, since it is larger than the sum of its proper divisors (2634966343).

14661221561 is an equidigital number, since it uses as much as digits as its factorization.

14661221561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67563271.

The product of its digits is 17280, while the sum is 35.

The spelling of 14661221561 in words is "fourteen billion, six hundred sixty-one million, two hundred twenty-one thousand, five hundred sixty-one".