65699057 has 2 divisors, whose sum is σ = 65699058. Its totient is φ = 65699056.

The previous prime is 65699047. The next prime is 65699059. The reversal of 65699057 is 75099656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44502241 + 21196816 = 6671^2 + 4604^2 .

It is a cyclic number.

It is not a de Polignac number, because 65699057 - 2⁶ = 65698993 is a prime.

Together with 65699059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65699059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32849528 + 32849529.

It is an arithmetic number, because the mean of its divisors is an integer number (32849529).

Almost surely, 2^65699057 is an apocalyptic number.

It is an amenable number.

65699057 is a deficient number, since it is larger than the sum of its proper divisors (1).

65699057 is an equidigital number, since it uses as much as digits as its factorization.

65699057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 510300, while the sum is 47.

The square root of 65699057 is about 8105.4954814619. The cubic root of 65699057 is about 403.5088323218.

The spelling of 65699057 in words is "sixty-five million, six hundred ninety-nine thousand, fifty-seven".