665063755 has 8 divisors (see below), whose sum is σ = 798370272. Its totient is φ = 531855168.

The previous prime is 665063723. The next prime is 665063761. The reversal of 665063755 is 557360566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 665063755 - 2⁵ = 665063723 is a prime.

It is a Duffinian number.

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, 8602 + ... + 37471.

It is an arithmetic number, because the mean of its divisors is an integer number (99796284).

Almost surely, 2^665063755 is an apocalyptic number.

665063755 is a deficient number, since it is larger than the sum of its proper divisors (133306517).

665063755 is a wasteful number, since it uses less digits than its factorization.

665063755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48965.

The product of its (nonzero) digits is 567000, while the sum is 43.

The square root of 665063755 is about 25788.8300432571. The cubic root of 665063755 is about 872.8797666980.

The spelling of 665063755 in words is "six hundred sixty-five million, sixty-three thousand, seven hundred fifty-five".