66624325740 has 576 divisors, whose sum is σ = 256544870400. Its totient is φ = 14174279424.

The previous prime is 66624325667. The next prime is 66624325741. The reversal of 66624325740 is 4752342666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (66624325741) by changing a digit.

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 191 ways as a sum of consecutive naturals, for example, 38135547 + ... + 38137293.

It is an arithmetic number, because the mean of its divisors is an integer number (445390400).

Almost surely, 2^66624325740 is an apocalyptic number.

66624325740 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 66624325740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128272435200).

66624325740 is an abundant number, since it is smaller than the sum of its proper divisors (189920544660).

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

66624325740 is a wasteful number, since it uses less digits than its factorization.

66624325740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856 (or 1842 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 45.

The spelling of 66624325740 in words is "sixty-six billion, six hundred twenty-four million, three hundred twenty-five thousand, seven hundred forty".