66145025000 has 96 divisors (see below), whose sum is σ = 155240064000. Its totient is φ = 26420040000.

The previous prime is 66145024951. The next prime is 66145025003. The reversal of 66145025000 is 52054166.

It is not an unprimeable number, because it can be changed into a prime (66145025003) 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, 22973561 + ... + 22976439.

It is an arithmetic number, because the mean of its divisors is an integer number (1617084000).

Almost surely, 2^66145025000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66145025000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77620032000).

66145025000 is an abundant number, since it is smaller than the sum of its proper divisors (89095039000).

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

66145025000 is an equidigital number, since it uses as much as digits as its factorization.

66145025000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3829 (or 3805 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 66145025000 its reverse (52054166), we get a palindrome (66197079166).

The spelling of 66145025000 in words is "sixty-six billion, one hundred forty-five million, twenty-five thousand".