66502128 has 160 divisors (see below), whose sum is σ = 225699840. Its totient is φ = 16346880.

The previous prime is 66502103. The next prime is 66502151. The reversal of 66502128 is 82120566.

It is a junction number, because it is equal to n+sod(n) for n = 66502095 and 66502104.

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, 69751 + ... + 70697.

It is an arithmetic number, because the mean of its divisors is an integer number (1410624).

Almost surely, 2^66502128 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 66502128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112849920).

66502128 is an abundant number, since it is smaller than the sum of its proper divisors (159197712).

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

66502128 is a wasteful number, since it uses less digits than its factorization.

66502128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995 (or 989 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 66502128 is about 8154.8836901577. The cubic root of 66502128 is about 405.1462724202.

It can be divided in two parts, 6650 and 2128, that added together give a palindrome (8778).

The spelling of 66502128 in words is "sixty-six million, five hundred two thousand, one hundred twenty-eight".