66225839 has 2 divisors, whose sum is σ = 66225840. Its totient is φ = 66225838.

The previous prime is 66225833. The next prime is 66225847. The reversal of 66225839 is 93852266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66225839 - 2²⁰ = 65177263 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66225796 and 66225805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66225833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33112919 + 33112920.

It is an arithmetic number, because the mean of its divisors is an integer number (33112920).

Almost surely, 2^66225839 is an apocalyptic number.

66225839 is a deficient number, since it is larger than the sum of its proper divisors (1).

66225839 is an equidigital number, since it uses as much as digits as its factorization.

66225839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 66225839 is about 8137.9259642737. The cubic root of 66225839 is about 404.5844215509.

The spelling of 66225839 in words is "sixty-six million, two hundred twenty-five thousand, eight hundred thirty-nine".