65605957 has 2 divisors, whose sum is σ = 65605958. Its totient is φ = 65605956.

The previous prime is 65605949. The next prime is 65605961. The reversal of 65605957 is 75950656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62504836 + 3101121 = 7906^2 + 1761^2 .

It is a cyclic number.

It is not a de Polignac number, because 65605957 - 2³ = 65605949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65605987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32802978 + 32802979.

It is an arithmetic number, because the mean of its divisors is an integer number (32802979).

Almost surely, 2^65605957 is an apocalyptic number.

It is an amenable number.

65605957 is a deficient number, since it is larger than the sum of its proper divisors (1).

65605957 is an equidigital number, since it uses as much as digits as its factorization.

65605957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 283500, while the sum is 43.

The square root of 65605957 is about 8099.7504282539. The cubic root of 65605957 is about 403.3181424661.

The spelling of 65605957 in words is "sixty-five million, six hundred five thousand, nine hundred fifty-seven".