65656769 has 2 divisors, whose sum is σ = 65656770. Its totient is φ = 65656768.

The previous prime is 65656757. The next prime is 65656777. The reversal of 65656769 is 96765656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40806544 + 24850225 = 6388^2 + 4985^2 .

It is a cyclic number.

It is not a de Polignac number, because 65656769 - 2¹² = 65652673 is a prime.

It is a super-2 number, since 2×65656769² = 8621622631038722, which contains 22 as substring.

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

It is not a weakly prime, because it can be changed into another prime (65656709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32828384 + 32828385.

It is an arithmetic number, because the mean of its divisors is an integer number (32828385).

Almost surely, 2^65656769 is an apocalyptic number.

It is an amenable number.

65656769 is a deficient number, since it is larger than the sum of its proper divisors (1).

65656769 is an equidigital number, since it uses as much as digits as its factorization.

65656769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2041200, while the sum is 50.

The square root of 65656769 is about 8102.8864610088. The cubic root of 65656769 is about 403.4222392785.

The spelling of 65656769 in words is "sixty-five million, six hundred fifty-six thousand, seven hundred sixty-nine".