16616610667 has 4 divisors (see below), whose sum is σ = 17021893896. Its totient is φ = 16211327440.

The previous prime is 16616610649. The next prime is 16616610677. The reversal of 16616610667 is 76601661661.

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 16616610667 - 2¹⁵ = 16616577899 is a prime.

It is a super-2 number, since 2×16616610667² (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 (16616610677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202641553 + ... + 202641634.

It is an arithmetic number, because the mean of its divisors is an integer number (4255473474).

Almost surely, 2^16616610667 is an apocalyptic number.

16616610667 is a deficient number, since it is larger than the sum of its proper divisors (405283229).

16616610667 is an equidigital number, since it uses as much as digits as its factorization.

16616610667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405283228.

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 16616610667 in words is "sixteen billion, six hundred sixteen million, six hundred ten thousand, six hundred sixty-seven".