665086340 has 24 divisors (see below), whose sum is σ = 1397172672. Its totient is φ = 265940960.

The previous prime is 665086339. The next prime is 665086391. The reversal of 665086340 is 43680566.

It is a junction number, because it is equal to n+sod(n) for n = 665086294 and 665086303.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 94007 + ... + 100833.

It is an arithmetic number, because the mean of its divisors is an integer number (58215528).

Almost surely, 2^665086340 is an apocalyptic number.

It is an amenable number.

665086340 is an abundant number, since it is smaller than the sum of its proper divisors (732086332).

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

665086340 is a wasteful number, since it uses less digits than its factorization.

665086340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11707 (or 11705 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 665086340 is about 25789.2679229171. The cubic root of 665086340 is about 872.8896473379.

The spelling of 665086340 in words is "six hundred sixty-five million, eighty-six thousand, three hundred forty".