665117248 has 56 divisors (see below), whose sum is σ = 1401775200. Its totient is φ = 312035328.

The previous prime is 665117239. The next prime is 665117251. The reversal of 665117248 is 842711566.

It is a self number, because there is not a number n which added to its sum of digits gives 665117248.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455143 + ... + 456601.

It is an arithmetic number, because the mean of its divisors is an integer number (25031700).

Almost surely, 2^665117248 is an apocalyptic number.

665117248 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665117248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (700887600).

665117248 is an abundant number, since it is smaller than the sum of its proper divisors (736657952).

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

665117248 is a wasteful number, since it uses less digits than its factorization.

665117248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907 (or 1897 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 665117248 is about 25789.8671574710. The cubic root of 665117248 is about 872.9031688181.

The spelling of 665117248 in words is "six hundred sixty-five million, one hundred seventeen thousand, two hundred forty-eight".