16662034611667 has 4 divisors (see below), whose sum is σ = 16670574867136. Its totient is φ = 16653494356200.

The previous prime is 16662034611661. The next prime is 16662034611679. The reversal of 16662034611667 is 76611643026661.

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

It is a cyclic number.

It is not a de Polignac number, because 16662034611667 - 2³¹ = 16659887128019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16662034611661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4270124808 + ... + 4270128709.

It is an arithmetic number, because the mean of its divisors is an integer number (4167643716784).

Almost surely, 2^{16662034611667} is an apocalyptic number.

16662034611667 is a deficient number, since it is larger than the sum of its proper divisors (8540255469).

16662034611667 is an equidigital number, since it uses as much as digits as its factorization.

16662034611667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8540255468.

The product of its (nonzero) digits is 7838208, while the sum is 55.

The spelling of 16662034611667 in words is "sixteen trillion, six hundred sixty-two billion, thirty-four million, six hundred eleven thousand, six hundred sixty-seven".