65997959 has 2 divisors, whose sum is σ = 65997960. Its totient is φ = 65997958.

The previous prime is 65997941. The next prime is 65997983. The reversal of 65997959 is 95979956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65997959 - 2⁸ = 65997703 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 65997898 and 65997907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65997929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32998979 + 32998980.

It is an arithmetic number, because the mean of its divisors is an integer number (32998980).

Almost surely, 2^65997959 is an apocalyptic number.

65997959 is a deficient number, since it is larger than the sum of its proper divisors (1).

65997959 is an equidigital number, since it uses as much as digits as its factorization.

65997959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6889050, while the sum is 59.

The square root of 65997959 is about 8123.9127887983. The cubic root of 65997959 is about 404.1198362764.

The spelling of 65997959 in words is "sixty-five million, nine hundred ninety-seven thousand, nine hundred fifty-nine".