65656765 has 8 divisors (see below), whose sum is σ = 79043328. Its totient is φ = 52355280.

The previous prime is 65656757. The next prime is 65656769. The reversal of 65656765 is 56765656.

65656765 is nontrivially palindromic in base 6.

65656765 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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

It is not a de Polignac number, because 65656765 - 2³ = 65656757 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65656769) 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 7 ways as a sum of consecutive naturals, for example, 19557 + ... + 22666.

It is an arithmetic number, because the mean of its divisors is an integer number (9880416).

Almost surely, 2^65656765 is an apocalyptic number.

It is an amenable number.

65656765 is a deficient number, since it is larger than the sum of its proper divisors (13386563).

65656765 is a wasteful number, since it uses less digits than its factorization.

65656765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42539.

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

The square root of 65656765 is about 8102.8862141832. The cubic root of 65656765 is about 403.4222310859.

The spelling of 65656765 in words is "sixty-five million, six hundred fifty-six thousand, seven hundred sixty-five".