66020325504 has 128 divisors (see below), whose sum is σ = 200606484480. Its totient is φ = 18845291520.

The previous prime is 66020325493. The next prime is 66020325523. The reversal of 66020325504 is 40552302066.

66020325504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×66020325504² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3007689 + ... + 3029559.

It is an arithmetic number, because the mean of its divisors is an integer number (1567238160).

Almost surely, 2^66020325504 is an apocalyptic number.

66020325504 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 66020325504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100303242240).

66020325504 is an abundant number, since it is smaller than the sum of its proper divisors (134586158976).

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

66020325504 is a wasteful number, since it uses less digits than its factorization.

66020325504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23018 (or 23006 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

The spelling of 66020325504 in words is "sixty-six billion, twenty million, three hundred twenty-five thousand, five hundred four".