665070006565 has 16 divisors (see below), whose sum is σ = 806717523456. Its totient is φ = 526311676800.

The previous prime is 665070006539. The next prime is 665070006571. The reversal of 665070006565 is 565600070566.

It is not a de Polignac number, because 665070006565 - 2³¹ = 662922522917 is a prime.

It is a super-2 number, since 2×665070006565² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 239616 + ... + 1177945.

It is an arithmetic number, because the mean of its divisors is an integer number (50419845216).

Almost surely, 2^665070006565 is an apocalyptic number.

It is an amenable number.

665070006565 is a deficient number, since it is larger than the sum of its proper divisors (141647516891).

665070006565 is a wasteful number, since it uses less digits than its factorization.

665070006565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418580.

The product of its (nonzero) digits is 1134000, while the sum is 46.

The spelling of 665070006565 in words is "six hundred sixty-five billion, seventy million, six thousand, five hundred sixty-five".