665046959 has 4 divisors (see below), whose sum is σ = 665972640. Its totient is φ = 664121280.

The previous prime is 665046947. The next prime is 665046973. The reversal of 665046959 is 959640566.

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 665046959 - 2¹² = 665042863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665046059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461762 + ... + 463199.

It is an arithmetic number, because the mean of its divisors is an integer number (166493160).

Almost surely, 2^665046959 is an apocalyptic number.

665046959 is a deficient number, since it is larger than the sum of its proper divisors (925681).

665046959 is an equidigital number, since it uses as much as digits as its factorization.

665046959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925680.

The product of its (nonzero) digits is 1749600, while the sum is 50.

The square root of 665046959 is about 25788.5043963391. The cubic root of 665046959 is about 872.8724185243.

The spelling of 665046959 in words is "six hundred sixty-five million, forty-six thousand, nine hundred fifty-nine".