667170169 has 4 divisors (see below), whose sum is σ = 667779444. Its totient is φ = 666560896.

The previous prime is 667170167. The next prime is 667170191. The reversal of 667170169 is 961071766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 961071766 = 2 ⋅480535883.

It can be written as a sum of positive squares in 2 ways, for example, as 161594944 + 505575225 = 12712^2 + 22485^2 .

It is a cyclic number.

It is not a de Polignac number, because 667170169 - 2¹ = 667170167 is a prime.

It is a super-2 number, since 2×667170169² = 890232068806977122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667170167) 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, 302992 + ... + 305185.

It is an arithmetic number, because the mean of its divisors is an integer number (166944861).

Almost surely, 2^667170169 is an apocalyptic number.

It is an amenable number.

667170169 is a deficient number, since it is larger than the sum of its proper divisors (609275).

667170169 is a wasteful number, since it uses less digits than its factorization.

667170169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609274.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 667170169 is about 25829.6374151865. The cubic root of 667170169 is about 873.8003342943.

The spelling of 667170169 in words is "six hundred sixty-seven million, one hundred seventy thousand, one hundred sixty-nine".