66760389528 has 128 divisors (see below), whose sum is σ = 200942553600. Its totient is φ = 18056134656.

The previous prime is 66760389517. The next prime is 66760389533. The reversal of 66760389528 is 82598306766.

It is a happy number.

It is a congruent number.

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, 4375000 + ... + 4390232.

It is an arithmetic number, because the mean of its divisors is an integer number (1569863700).

Almost surely, 2^66760389528 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 66760389528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100471276800).

66760389528 is an abundant number, since it is smaller than the sum of its proper divisors (134182164072).

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

66760389528 is a wasteful number, since it uses less digits than its factorization.

66760389528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16641 (or 16637 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 60.

The spelling of 66760389528 in words is "sixty-six billion, seven hundred sixty million, three hundred eighty-nine thousand, five hundred twenty-eight".