66454500120 has 128 divisors (see below), whose sum is σ = 200643194880. Its totient is φ = 17607680000.

The previous prime is 66454500103. The next prime is 66454500121. The reversal of 66454500120 is 2100545466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66454500121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36694015 + ... + 36695825.

It is an arithmetic number, because the mean of its divisors is an integer number (1567524960).

Almost surely, 2^66454500120 is an apocalyptic number.

66454500120 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 66454500120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100321597440).

66454500120 is an abundant number, since it is smaller than the sum of its proper divisors (134188694760).

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

66454500120 is a wasteful number, since it uses less digits than its factorization.

66454500120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3617 (or 3613 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The spelling of 66454500120 in words is "sixty-six billion, four hundred fifty-four million, five hundred thousand, one hundred twenty".