665860248 has 24 divisors (see below), whose sum is σ = 1803371700. Its totient is φ = 221953392.

The previous prime is 665860231. The next prime is 665860249. The reversal of 665860248 is 842068566.

665860248 is a `hidden beast` number, since 66 + 586 + 0 + 2 + 4 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665860249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4623958 + ... + 4624101.

Almost surely, 2^665860248 is an apocalyptic number.

It is an amenable number.

665860248 is an abundant number, since it is smaller than the sum of its proper divisors (1137511452).

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

665860248 is a wasteful number, since it uses less digits than its factorization.

665860248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9248071 (or 9248064 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 665860248 is about 25804.2680190700. The cubic root of 665860248 is about 873.2280868192.

The spelling of 665860248 in words is "six hundred sixty-five million, eight hundred sixty thousand, two hundred forty-eight".