65711669 has 2 divisors, whose sum is σ = 65711670. Its totient is φ = 65711668.

The previous prime is 65711641. The next prime is 65711689. The reversal of 65711669 is 96611756.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61811044 + 3900625 = 7862^2 + 1975^2 .

It is a cyclic number.

It is not a de Polignac number, because 65711669 - 2²⁴ = 48934453 is a prime.

It is a super-2 number, since 2×65711669² = 8636046885531122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65711609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32855834 + 32855835.

It is an arithmetic number, because the mean of its divisors is an integer number (32855835).

Almost surely, 2^65711669 is an apocalyptic number.

It is an amenable number.

65711669 is a deficient number, since it is larger than the sum of its proper divisors (1).

65711669 is an equidigital number, since it uses as much as digits as its factorization.

65711669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 41.

The square root of 65711669 is about 8106.2734348158. The cubic root of 65711669 is about 403.5346506923.

The spelling of 65711669 in words is "sixty-five million, seven hundred eleven thousand, six hundred sixty-nine".