16661847012 has 12 divisors (see below), whose sum is σ = 38877643056. Its totient is φ = 5553949000.

The previous prime is 16661846987. The next prime is 16661847031. The reversal of 16661847012 is 21074816661.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 694243614 + ... + 694243637.

It is an arithmetic number, because the mean of its divisors is an integer number (3239803588).

Almost surely, 2^16661847012 is an apocalyptic number.

16661847012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16661847012 is an abundant number, since it is smaller than the sum of its proper divisors (22215796044).

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

16661847012 is a wasteful number, since it uses less digits than its factorization.

16661847012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388487258 (or 1388487256 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The spelling of 16661847012 in words is "sixteen billion, six hundred sixty-one million, eight hundred forty-seven thousand, twelve".