696665565 has 24 divisors (see below), whose sum is σ = 1208640888. Its totient is φ = 371220480.

The previous prime is 696665539. The next prime is 696665591. The reversal of 696665565 is 565566696.

696665565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (696665539) and next prime (696665591).

It can be written as a sum of positive squares in 4 ways, for example, as 133125444 + 563540121 = 11538^2 + 23739^2 .

It is not a de Polignac number, because 696665565 - 2¹⁷ = 696534493 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48405 + ... + 61125.

It is an arithmetic number, because the mean of its divisors is an integer number (50360037).

Almost surely, 2^696665565 is an apocalyptic number.

It is an amenable number.

696665565 is a deficient number, since it is larger than the sum of its proper divisors (511975323).

696665565 is a wasteful number, since it uses less digits than its factorization.

696665565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13949 (or 13946 counting only the distinct ones).

The product of its digits is 8748000, while the sum is 54.

The square root of 696665565 is about 26394.4229904728. The cubic root of 696665565 is about 886.4919199945.

The spelling of 696665565 in words is "six hundred ninety-six million, six hundred sixty-five thousand, five hundred sixty-five".