66187425024 has 270 divisors, whose sum is σ = 229584315114. Its totient is φ = 18910402560.

The previous prime is 66187424993. The next prime is 66187425077. The reversal of 66187425024 is 42052478166.

66187425024 is a `hidden beast` number, since 6 + 61 + 87 + 4 + 2 + 502 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 65552385024 + 635040000 = 256032^2 + 25200^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 983494 + ... + 1048634.

Almost surely, 2^66187425024 is an apocalyptic number.

66187425024 is a gapful number since it is divisible by the number (64) 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 66187425024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114792157557).

66187425024 is an abundant number, since it is smaller than the sum of its proper divisors (163396890090).

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

66187425024 is an equidigital number, since it uses as much as digits as its factorization.

66187425024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65183 (or 65153 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 66187425024 in words is "sixty-six billion, one hundred eighty-seven million, four hundred twenty-five thousand, twenty-four".