665035740 has 36 divisors (see below), whose sum is σ = 2017275624. Its totient is φ = 177342816.

The previous prime is 665035711. The next prime is 665035747. The reversal of 665035740 is 47530566.

665035740 is a `hidden beast` number, since 66 + 503 + 57 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 665035695 and 665035704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665035747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1847142 + ... + 1847501.

It is an arithmetic number, because the mean of its divisors is an integer number (56035434).

Almost surely, 2^665035740 is an apocalyptic number.

665035740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

665035740 is an abundant number, since it is smaller than the sum of its proper divisors (1352239884).

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

665035740 is a wasteful number, since it uses less digits than its factorization.

665035740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3694658 (or 3694653 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 665035740 is about 25788.2868760218. The cubic root of 665035740 is about 872.8675101938.

The spelling of 665035740 in words is "six hundred sixty-five million, thirty-five thousand, seven hundred forty".