66876643 has 2 divisors, whose sum is σ = 66876644. Its totient is φ = 66876642.

The previous prime is 66876611. The next prime is 66876671. The reversal of 66876643 is 34667866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66876643 - 2⁵ = 66876611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66876593 and 66876602.

It is not a weakly prime, because it can be changed into another prime (66876673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33438321 + 33438322.

It is an arithmetic number, because the mean of its divisors is an integer number (33438322).

Almost surely, 2^66876643 is an apocalyptic number.

66876643 is a deficient number, since it is larger than the sum of its proper divisors (1).

66876643 is an equidigital number, since it uses as much as digits as its factorization.

66876643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 46.

The square root of 66876643 is about 8177.8140722323. The cubic root of 66876643 is about 405.9053930354.

The spelling of 66876643 in words is "sixty-six million, eight hundred seventy-six thousand, six hundred forty-three".