16661052447636 has 48 divisors (see below), whose sum is σ = 41031593556800. Its totient is φ = 5247279366912.

The previous prime is 16661052447607. The next prime is 16661052447647. The reversal of 16661052447636 is 63674425016661.

It is a happy number.

It is a super-3 number, since 3×16661052447636³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 97870441 + ... + 98040528.

Almost surely, 2^{16661052447636} is an apocalyptic number.

It is an amenable number.

16661052447636 is an abundant number, since it is smaller than the sum of its proper divisors (24370541109164).

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

16661052447636 is a wasteful number, since it uses less digits than its factorization.

16661052447636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195911368 (or 195911366 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 57.

The spelling of 16661052447636 in words is "sixteen trillion, six hundred sixty-one billion, fifty-two million, four hundred forty-seven thousand, six hundred thirty-six".