66837959 has 2 divisors, whose sum is σ = 66837960. Its totient is φ = 66837958.

The previous prime is 66837937. The next prime is 66837971. The reversal of 66837959 is 95973866.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66837959 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66837959.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66837989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33418979 + 33418980.

It is an arithmetic number, because the mean of its divisors is an integer number (33418980).

Almost surely, 2^66837959 is an apocalyptic number.

66837959 is a deficient number, since it is larger than the sum of its proper divisors (1).

66837959 is an equidigital number, since it uses as much as digits as its factorization.

66837959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 53.

The square root of 66837959 is about 8175.4485503855. The cubic root of 66837959 is about 405.8271142221.

The spelling of 66837959 in words is "sixty-six million, eight hundred thirty-seven thousand, nine hundred fifty-nine".