665151585 has 32 divisors (see below), whose sum is σ = 1218281472. Its totient is φ = 303568320.

The previous prime is 665151551. The next prime is 665151587. The reversal of 665151585 is 585151566.

It is not a de Polignac number, because 665151585 - 2⁶ = 665151521 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (665151587) 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, 63040 + ... + 72830.

It is an arithmetic number, because the mean of its divisors is an integer number (38071296).

Almost surely, 2^665151585 is an apocalyptic number.

It is an amenable number.

665151585 is a deficient number, since it is larger than the sum of its proper divisors (553129887).

665151585 is a wasteful number, since it uses less digits than its factorization.

665151585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10453.

The product of its digits is 180000, while the sum is 42.

The square root of 665151585 is about 25790.5328560695. The cubic root of 665151585 is about 872.9181899092.

The spelling of 665151585 in words is "six hundred sixty-five million, one hundred fifty-one thousand, five hundred eighty-five".