665074167 has 16 divisors (see below), whose sum is σ = 892960992. Its totient is φ = 440294400.

The previous prime is 665074159. The next prime is 665074169. The reversal of 665074167 is 761470566.

It is not a de Polignac number, because 665074167 - 2³ = 665074159 is a prime.

It is a super-2 number, since 2×665074167² = 884647295221487778, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665074169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 553167 + ... + 554367.

It is an arithmetic number, because the mean of its divisors is an integer number (55810062).

Almost surely, 2^665074167 is an apocalyptic number.

665074167 is a deficient number, since it is larger than the sum of its proper divisors (227886825).

665074167 is a wasteful number, since it uses less digits than its factorization.

665074167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338.

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 665074167 is about 25789.0319128113. The cubic root of 665074167 is about 872.8843218386.

The spelling of 665074167 in words is "six hundred sixty-five million, seventy-four thousand, one hundred sixty-seven".