665460763 has 4 divisors (see below), whose sum is σ = 725957208. Its totient is φ = 604964320.

The previous prime is 665460751. The next prime is 665460779. The reversal of 665460763 is 367064566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 665460763 - 2⁹ = 665460251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665464763) 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 3 ways as a sum of consecutive naturals, for example, 30248206 + ... + 30248227.

It is an arithmetic number, because the mean of its divisors is an integer number (181489302).

Almost surely, 2^665460763 is an apocalyptic number.

665460763 is a deficient number, since it is larger than the sum of its proper divisors (60496445).

665460763 is a wasteful number, since it uses less digits than its factorization.

665460763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60496444.

The product of its (nonzero) digits is 544320, while the sum is 43.

The square root of 665460763 is about 25796.5261808640. The cubic root of 665460763 is about 873.0534198830.

The spelling of 665460763 in words is "six hundred sixty-five million, four hundred sixty thousand, seven hundred sixty-three".