16557420066600 has 768 divisors, whose sum is σ = 62993139609600. Its totient is φ = 3513240207360.

The previous prime is 16557420066529. The next prime is 16557420066611. The reversal of 16557420066600 is 666002475561.

It is a self number, because there is not a number n which added to its sum of digits gives 16557420066600.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 4132121797 + ... + 4132125803.

It is an arithmetic number, because the mean of its divisors is an integer number (82022317200).

Almost surely, 2^{16557420066600} is an apocalyptic number.

16557420066600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16557420066600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31496569804800).

16557420066600 is an abundant number, since it is smaller than the sum of its proper divisors (46435719543000).

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

16557420066600 is a wasteful number, since it uses less digits than its factorization.

16557420066600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5082 (or 5073 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 48.

The spelling of 16557420066600 in words is "sixteen trillion, five hundred fifty-seven billion, four hundred twenty million, sixty-six thousand, six hundred".