66582839 has 2 divisors, whose sum is σ = 66582840. Its totient is φ = 66582838.

The previous prime is 66582827. The next prime is 66582847. The reversal of 66582839 is 93828566.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66582839 - 2⁸ = 66582583 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66582793 and 66582802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66587839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33291419 + 33291420.

It is an arithmetic number, because the mean of its divisors is an integer number (33291420).

Almost surely, 2^66582839 is an apocalyptic number.

66582839 is a deficient number, since it is larger than the sum of its proper divisors (1).

66582839 is an equidigital number, since it uses as much as digits as its factorization.

66582839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 47.

The square root of 66582839 is about 8159.8308193246. The cubic root of 66582839 is about 405.3101094878.

The spelling of 66582839 in words is "sixty-six million, five hundred eighty-two thousand, eight hundred thirty-nine".