16657223241 has 4 divisors (see below), whose sum is σ = 22209630992. Its totient is φ = 11104815492.

The previous prime is 16657223239. The next prime is 16657223281. The reversal of 16657223241 is 14232275661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14232275661 = 3 ⋅4744091887.

It is not a de Polignac number, because 16657223241 - 2¹ = 16657223239 is a prime.

It is a super-2 number, since 2×16657223241² (a number of 21 digits) contains 22 as substring.

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 16657223241.

It is not an unprimeable number, because it can be changed into a prime (16657223281) 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, 2776203871 + ... + 2776203876.

It is an arithmetic number, because the mean of its divisors is an integer number (5552407748).

Almost surely, 2^16657223241 is an apocalyptic number.

It is an amenable number.

16657223241 is a deficient number, since it is larger than the sum of its proper divisors (5552407751).

16657223241 is an equidigital number, since it uses as much as digits as its factorization.

16657223241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5552407750.

The product of its digits is 120960, while the sum is 39.

The spelling of 16657223241 in words is "sixteen billion, six hundred fifty-seven million, two hundred twenty-three thousand, two hundred forty-one".