16662446113 has 4 divisors (see below), whose sum is σ = 17642590020. Its totient is φ = 15682302208.

The previous prime is 16662446083. The next prime is 16662446123. The reversal of 16662446113 is 31164426661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31164426661 = 122099 ⋅255239.

It can be written as a sum of positive squares in 2 ways, for example, as 15181196944 + 1481249169 = 123212^2 + 38487^2 .

It is a cyclic number.

It is not a de Polignac number, because 16662446113 - 2²¹ = 16660348961 is a prime.

It is a super-2 number, since 2×16662446113² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16662446123) 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, 490071928 + ... + 490071961.

It is an arithmetic number, because the mean of its divisors is an integer number (4410647505).

Almost surely, 2^16662446113 is an apocalyptic number.

It is an amenable number.

16662446113 is a deficient number, since it is larger than the sum of its proper divisors (980143907).

16662446113 is an equidigital number, since it uses as much as digits as its factorization.

16662446113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980143906.

The product of its digits is 124416, while the sum is 40.

The spelling of 16662446113 in words is "sixteen billion, six hundred sixty-two million, four hundred forty-six thousand, one hundred thirteen".