665018473 has 8 divisors (see below), whose sum is σ = 764268480. Its totient is φ = 566830320.

The previous prime is 665018443. The next prime is 665018477. The reversal of 665018473 is 374810566.

It is a happy number.

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

It is not a de Polignac number, because 665018473 - 2⁹ = 665017961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665018477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264118 + ... + 266623.

It is an arithmetic number, because the mean of its divisors is an integer number (95533560).

Almost surely, 2^665018473 is an apocalyptic number.

It is an amenable number.

665018473 is a deficient number, since it is larger than the sum of its proper divisors (99250007).

665018473 is a wasteful number, since it uses less digits than its factorization.

665018473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530927.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 665018473 is about 25787.9520900749. The cubic root of 665018473 is about 872.8599557459.

The spelling of 665018473 in words is "six hundred sixty-five million, eighteen thousand, four hundred seventy-three".