65676565 has 16 divisors (see below), whose sum is σ = 80463600. Its totient is φ = 51448320.

The previous prime is 65676557. The next prime is 65676581. The reversal of 65676565 is 56567656.

65676565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

65676565 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 8 ways, for example, as 18438436 + 47238129 = 4294^2 + 6873^2 .

It is not a de Polignac number, because 65676565 - 2³ = 65676557 is a prime.

It is a super-2 number, since 2×65676565² = 8626822380398450, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106137 + ... + 106753.

It is an arithmetic number, because the mean of its divisors is an integer number (5028975).

Almost surely, 2^65676565 is an apocalyptic number.

It is an amenable number.

65676565 is a deficient number, since it is larger than the sum of its proper divisors (14787035).

65676565 is a wasteful number, since it uses less digits than its factorization.

65676565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032.

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

The square root of 65676565 is about 8104.1079089558. The cubic root of 65676565 is about 403.4627801309.

The spelling of 65676565 in words is "sixty-five million, six hundred seventy-six thousand, five hundred sixty-five".