66864248 has 16 divisors (see below), whose sum is σ = 136767960. Its totient is φ = 30392800.

The previous prime is 66864229. The next prime is 66864251. The reversal of 66864248 is 84246866.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 66864199 and 66864208.

It is a congruent 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, 379823 + ... + 379998.

Almost surely, 2^66864248 is an apocalyptic number.

It is an amenable number.

66864248 is an abundant number, since it is smaller than the sum of its proper divisors (69903712).

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

66864248 is a wasteful number, since it uses less digits than its factorization.

66864248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759838 (or 759834 counting only the distinct ones).

The product of its digits is 442368, while the sum is 44.

The square root of 66864248 is about 8177.0561940102. The cubic root of 66864248 is about 405.8803144829.

The spelling of 66864248 in words is "sixty-six million, eight hundred sixty-four thousand, two hundred forty-eight".