665225005 has 8 divisors (see below), whose sum is σ = 803168352. Its totient is φ = 528914448.

The previous prime is 665224991. The next prime is 665225023. The reversal of 665225005 is 500522566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 665225005 - 2¹³ = 665216813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407299 + ... + 408928.

It is an arithmetic number, because the mean of its divisors is an integer number (100396044).

Almost surely, 2^665225005 is an apocalyptic number.

It is an amenable number.

665225005 is a deficient number, since it is larger than the sum of its proper divisors (137943347).

665225005 is a wasteful number, since it uses less digits than its factorization.

665225005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816395.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 665225005 is about 25791.9562073139. The cubic root of 665225005 is about 872.9503065459.

The spelling of 665225005 in words is "six hundred sixty-five million, two hundred twenty-five thousand, five".