665227005 has 16 divisors (see below), whose sum is σ = 1077838080. Its totient is φ = 350296128.

The previous prime is 665227001. The next prime is 665227007. The reversal of 665227005 is 500722566.

It is not a de Polignac number, because 665227005 - 2² = 665227001 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665227001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279502 + ... + 281871.

It is an arithmetic number, because the mean of its divisors is an integer number (67364880).

Almost surely, 2^665227005 is an apocalyptic number.

It is an amenable number.

665227005 is a deficient number, since it is larger than the sum of its proper divisors (412611075).

665227005 is a wasteful number, since it uses less digits than its factorization.

665227005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561460.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 665227005 is about 25791.9949790628. The cubic root of 665227005 is about 872.9511813872.

The spelling of 665227005 in words is "six hundred sixty-five million, two hundred twenty-seven thousand, five".