66831248 has 20 divisors (see below), whose sum is σ = 141257328. Its totient is φ = 30377760.

The previous prime is 66831211. The next prime is 66831277. The reversal of 66831248 is 84213866.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189686 + ... + 190037.

Almost surely, 2^66831248 is an apocalyptic number.

It is an amenable number.

66831248 is an abundant number, since it is smaller than the sum of its proper divisors (74426080).

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

66831248 is a wasteful number, since it uses less digits than its factorization.

66831248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379742 (or 379736 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 66831248 is about 8175.0381038867. The cubic root of 66831248 is about 405.8135311377.

The spelling of 66831248 in words is "sixty-six million, eight hundred thirty-one thousand, two hundred forty-eight".