66610335232 has 80 divisors (see below), whose sum is σ = 152601482880. Its totient is φ = 28453828608.

The previous prime is 66610335227. The next prime is 66610335241. The reversal of 66610335232 is 23253301666.

It is a junction number, because it is equal to n+sod(n) for n = 66610335191 and 66610335200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1070019 + ... + 1130557.

It is an arithmetic number, because the mean of its divisors is an integer number (1907518536).

Almost surely, 2^66610335232 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 66610335232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76300741440).

66610335232 is an abundant number, since it is smaller than the sum of its proper divisors (85991147648).

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

66610335232 is an equidigital number, since it uses as much as digits as its factorization.

66610335232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60871 (or 60855 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 37.

Adding to 66610335232 its reverse (23253301666), we get a palindrome (89863636898).

The spelling of 66610335232 in words is "sixty-six billion, six hundred ten million, three hundred thirty-five thousand, two hundred thirty-two".