66447332 has 48 divisors (see below), whose sum is σ = 142800000. Its totient is φ = 26968032.

The previous prime is 66447307. The next prime is 66447349. The reversal of 66447332 is 23374466.

It is a junction number, because it is equal to n+sod(n) for n = 66447292 and 66447301.

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, 24794 + ... + 27342.

It is an arithmetic number, because the mean of its divisors is an integer number (2975000).

Almost surely, 2^66447332 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 66447332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71400000).

66447332 is an abundant number, since it is smaller than the sum of its proper divisors (76352668).

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

66447332 is a wasteful number, since it uses less digits than its factorization.

66447332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2593 (or 2577 counting only the distinct ones).

The product of its digits is 72576, while the sum is 35.

The square root of 66447332 is about 8151.5232932256. The cubic root of 66447332 is about 405.0349652279.

The spelling of 66447332 in words is "sixty-six million, four hundred forty-seven thousand, three hundred thirty-two".