64666248 has 64 divisors (see below), whose sum is σ = 174182400. Its totient is φ = 19947840.

The previous prime is 64666237. The next prime is 64666331. The reversal of 64666248 is 84266646.

It is a nude number because it is divisible by every one of its digits.

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, 15223 + ... + 19001.

It is an arithmetic number, because the mean of its divisors is an integer number (2721600).

Almost surely, 2^64666248 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 64666248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87091200).

64666248 is an abundant number, since it is smaller than the sum of its proper divisors (109516152).

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

64666248 is a wasteful number, since it uses less digits than its factorization.

64666248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3842 (or 3838 counting only the distinct ones).

The product of its digits is 331776, while the sum is 42.

The square root of 64666248 is about 8041.5326897302. The cubic root of 64666248 is about 401.3832278548.

The spelling of 64666248 in words is "sixty-four million, six hundred sixty-six thousand, two hundred forty-eight".