16661124071634 has 256 divisors, whose sum is σ = 40172499763200. Its totient is φ = 4507118795520.

The previous prime is 16661124071611. The next prime is 16661124071653. The reversal of 16661124071634 is 43617042116661.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4881663712 + ... + 4881667124.

It is an arithmetic number, because the mean of its divisors is an integer number (156923827200).

Almost surely, 2^{16661124071634} is an apocalyptic number.

16661124071634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16661124071634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20086249881600).

16661124071634 is an abundant number, since it is smaller than the sum of its proper divisors (23511375691566).

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

16661124071634 is a wasteful number, since it uses less digits than its factorization.

16661124071634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3965.

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 16661124071634 in words is "sixteen trillion, six hundred sixty-one billion, one hundred twenty-four million, seventy-one thousand, six hundred thirty-four".