16661032032 has 24 divisors (see below), whose sum is σ = 43735209336. Its totient is φ = 5553677312.

The previous prime is 16661032027. The next prime is 16661032039. The reversal of 16661032032 is 23023016661.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16661032039) 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, 86776113 + ... + 86776304.

It is an arithmetic number, because the mean of its divisors is an integer number (1822300389).

Almost surely, 2^16661032032 is an apocalyptic number.

16661032032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16661032032 is an abundant number, since it is smaller than the sum of its proper divisors (27074177304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16661032032 is a wasteful number, since it uses less digits than its factorization.

16661032032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173552430 (or 173552422 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

Adding to 16661032032 its reverse (23023016661), we get a palindrome (39684048693).

The spelling of 16661032032 in words is "sixteen billion, six hundred sixty-one million, thirty-two thousand, thirty-two".