66287232 has 96 divisors (see below), whose sum is σ = 208128960. Its totient is φ = 20083200.

The previous prime is 66287231. The next prime is 66287237. The reversal of 66287232 is 23278266.

66287232 is a `hidden beast` number, since 6 + 628 + 7 + 23 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (66287231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10057 + ... + 15287.

It is an arithmetic number, because the mean of its divisors is an integer number (2168010).

Almost surely, 2^66287232 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 66287232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104064480).

66287232 is an abundant number, since it is smaller than the sum of its proper divisors (141841728).

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

66287232 is a wasteful number, since it uses less digits than its factorization.

66287232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5262 (or 5247 counting only the distinct ones).

The product of its digits is 48384, while the sum is 36.

The square root of 66287232 is about 8141.6971203798. The cubic root of 66287232 is about 404.7094028793.

The spelling of 66287232 in words is "sixty-six million, two hundred eighty-seven thousand, two hundred thirty-two".