65616697 has 2 divisors, whose sum is σ = 65616698. Its totient is φ = 65616696.

The previous prime is 65616679. The next prime is 65616731. The reversal of 65616697 is 79661656.

Together with previous prime (65616679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56490256 + 9126441 = 7516^2 + 3021^2 .

It is a cyclic number.

It is not a de Polignac number, because 65616697 - 2¹¹ = 65614649 is a prime.

It is not a weakly prime, because it can be changed into another prime (65616637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32808348 + 32808349.

It is an arithmetic number, because the mean of its divisors is an integer number (32808349).

Almost surely, 2^65616697 is an apocalyptic number.

It is an amenable number.

65616697 is a deficient number, since it is larger than the sum of its proper divisors (1).

65616697 is an equidigital number, since it uses as much as digits as its factorization.

65616697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 46.

The square root of 65616697 is about 8100.4133845132. The cubic root of 65616697 is about 403.3401496165.

The spelling of 65616697 in words is "sixty-five million, six hundred sixteen thousand, six hundred ninety-seven".