16611660541 has 8 divisors (see below), whose sum is σ = 19426261184. Its totient is φ = 13907436480.

The previous prime is 16611660503. The next prime is 16611660617. The reversal of 16611660541 is 14506611661.

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

It is not a de Polignac number, because 16611660541 - 2⁷ = 16611660413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16611660541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16611661541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27593820 + ... + 27594421.

It is an arithmetic number, because the mean of its divisors is an integer number (2428282648).

Almost surely, 2^16611660541 is an apocalyptic number.

It is an amenable number.

16611660541 is a deficient number, since it is larger than the sum of its proper divisors (2814600643).

16611660541 is an equidigital number, since it uses as much as digits as its factorization.

16611660541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55188291.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 16611660541 in words is "sixteen billion, six hundred eleven million, six hundred sixty thousand, five hundred forty-one".