66817343 has 2 divisors, whose sum is σ = 66817344. Its totient is φ = 66817342.

The previous prime is 66817337. The next prime is 66817351. The reversal of 66817343 is 34371866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66817343 - 2¹⁸ = 66555199 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66817297 and 66817306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66817393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33408671 + 33408672.

It is an arithmetic number, because the mean of its divisors is an integer number (33408672).

Almost surely, 2^66817343 is an apocalyptic number.

66817343 is a deficient number, since it is larger than the sum of its proper divisors (1).

66817343 is an equidigital number, since it uses as much as digits as its factorization.

66817343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 66817343 is about 8174.1876048938. The cubic root of 66817343 is about 405.7853844812.

The spelling of 66817343 in words is "sixty-six million, eight hundred seventeen thousand, three hundred forty-three".