65656768 has 14 divisors (see below), whose sum is σ = 130287776. Its totient is φ = 32828352.

The previous prime is 65656757. The next prime is 65656769. The reversal of 65656768 is 86765656.

It is a super-2 number, since 2×65656768² = 8621622368411648, which contains 22 as substring.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 512880 + ... + 513007.

Almost surely, 2^65656768 is an apocalyptic number.

It is an amenable number.

65656768 is a deficient number, since it is larger than the sum of its proper divisors (64631008).

65656768 is a wasteful number, since it uses less digits than its factorization.

65656768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025899 (or 1025889 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 49.

The square root of 65656768 is about 8102.8863993024. The cubic root of 65656768 is about 403.4222372303.

The spelling of 65656768 in words is "sixty-five million, six hundred fifty-six thousand, seven hundred sixty-eight".