665335740 has 48 divisors (see below), whose sum is σ = 1870404480. Its totient is φ = 176712000.

The previous prime is 665335721. The next prime is 665335753. The reversal of 665335740 is 47533566.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7030 + ... + 37149.

It is an arithmetic number, because the mean of its divisors is an integer number (38966760).

Almost surely, 2^665335740 is an apocalyptic number.

665335740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

665335740 is an abundant number, since it is smaller than the sum of its proper divisors (1205068740).

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

665335740 is a wasteful number, since it uses less digits than its factorization.

665335740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44442 (or 44440 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 39.

The square root of 665335740 is about 25794.1028144031. The cubic root of 665335740 is about 872.9987416810.

The spelling of 665335740 in words is "six hundred sixty-five million, three hundred thirty-five thousand, seven hundred forty".