16651464661 has 8 divisors (see below), whose sum is σ = 17938368000. Its totient is φ = 15365421552.

The previous prime is 16651464659. The next prime is 16651464671. The reversal of 16651464661 is 16646415661.

16651464661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 16651464661 - 2¹ = 16651464659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16651464671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174565 + ... + 252538.

It is an arithmetic number, because the mean of its divisors is an integer number (2242296000).

Almost surely, 2^16651464661 is an apocalyptic number.

It is an amenable number.

16651464661 is a deficient number, since it is larger than the sum of its proper divisors (1286903339).

16651464661 is a wasteful number, since it uses less digits than its factorization.

16651464661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430115.

The product of its digits is 622080, while the sum is 46.

The spelling of 16651464661 in words is "sixteen billion, six hundred fifty-one million, four hundred sixty-four thousand, six hundred sixty-one".