66489557930160 has 320 divisors, whose sum is σ = 225318887239680. Its totient is φ = 16146641387520.

The previous prime is 66489557930123. The next prime is 66489557930167. The reversal of 66489557930160 is 6103975598466.

It is a super-2 number, since 2×66489557930160² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66489557930167) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 843961651 + ... + 844040429.

It is an arithmetic number, because the mean of its divisors is an integer number (704121522624).

Almost surely, 2^{66489557930160} is an apocalyptic number.

66489557930160 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 66489557930160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112659443619840).

66489557930160 is an abundant number, since it is smaller than the sum of its proper divisors (158829329309520).

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

66489557930160 is a wasteful number, since it uses less digits than its factorization.

66489557930160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85516 (or 85510 counting only the distinct ones).

The product of its (nonzero) digits is 293932800, while the sum is 69.

The spelling of 66489557930160 in words is "sixty-six trillion, four hundred eighty-nine billion, five hundred fifty-seven million, nine hundred thirty thousand, one hundred sixty".