66188521641000 has 128 divisors (see below), whose sum is σ = 225281659224960. Its totient is φ = 16045702208000.

The previous prime is 66188521640981. The next prime is 66188521641083. The reversal of 66188521641000 is 14612588166.

It is a super-2 number, since 2×66188521641000² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1002823389 + ... + 1002889388.

It is an arithmetic number, because the mean of its divisors is an integer number (1760012962695).

Almost surely, 2^{66188521641000} is an apocalyptic number.

66188521641000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66188521641000 is an abundant number, since it is smaller than the sum of its proper divisors (159093137583960).

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

66188521641000 is a wasteful number, since it uses less digits than its factorization.

66188521641000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005712812 (or 2005712798 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 66188521641000 in words is "sixty-six trillion, one hundred eighty-eight billion, five hundred twenty-one million, six hundred forty-one thousand".