665667169 has 8 divisors (see below), whose sum is σ = 671276160. Its totient is φ = 660079536.

The previous prime is 665667091. The next prime is 665667187. The reversal of 665667169 is 961766566.

665667169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 665667169 - 2¹⁷ = 665536097 is a prime.

It is a super-2 number, since 2×665667169² = 886225559768949122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665677169) 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, 60627 + ... + 70759.

It is an arithmetic number, because the mean of its divisors is an integer number (83909520).

Almost surely, 2^665667169 is an apocalyptic number.

It is an amenable number.

665667169 is a deficient number, since it is larger than the sum of its proper divisors (5608991).

665667169 is a wasteful number, since it uses less digits than its factorization.

665667169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10679.

The product of its digits is 2449440, while the sum is 52.

The square root of 665667169 is about 25800.5265256351. The cubic root of 665667169 is about 873.1436755606.

The spelling of 665667169 in words is "six hundred sixty-five million, six hundred sixty-seven thousand, one hundred sixty-nine".