66998108160 has 432 divisors, whose sum is σ = 239313490416. Its totient is φ = 17326669824.

The previous prime is 66998108113. The next prime is 66998108167. The reversal of 66998108160 is 6180189966.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 66998108097 and 66998108106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66998108167) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 218234727 + ... + 218235033.

It is an arithmetic number, because the mean of its divisors is an integer number (553966413).

Almost surely, 2^66998108160 is an apocalyptic number.

66998108160 is a gapful number since it is divisible by the number (60) 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 66998108160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119656745208).

66998108160 is an abundant number, since it is smaller than the sum of its proper divisors (172315382256).

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

66998108160 is an equidigital number, since it uses as much as digits as its factorization.

66998108160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The spelling of 66998108160 in words is "sixty-six billion, nine hundred ninety-eight million, one hundred eight thousand, one hundred sixty".