665118567 has 32 divisors (see below), whose sum is σ = 1026360000. Its totient is φ = 425174400.

The previous prime is 665118551. The next prime is 665118599. The reversal of 665118567 is 765811566.

It is not a de Polignac number, because 665118567 - 2⁴ = 665118551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665116567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113817 + ... + 119517.

It is an arithmetic number, because the mean of its divisors is an integer number (32073750).

Almost surely, 2^665118567 is an apocalyptic number.

665118567 is a deficient number, since it is larger than the sum of its proper divisors (361241433).

665118567 is a wasteful number, since it uses less digits than its factorization.

665118567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5888 (or 5882 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 665118567 is about 25789.8927295171. The cubic root of 665118567 is about 872.9037458384.

It can be divided in two parts, 66511 and 8567, that added together give a triangular number (75078 = T₃₈₇).

The spelling of 665118567 in words is "six hundred sixty-five million, one hundred eighteen thousand, five hundred sixty-seven".