66922589 has 2 divisors, whose sum is σ = 66922590. Its totient is φ = 66922588.

The previous prime is 66922561. The next prime is 66922613. The reversal of 66922589 is 98522966.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45225625 + 21696964 = 6725^2 + 4658^2 .

It is a cyclic number.

It is not a de Polignac number, because 66922589 - 2⁸ = 66922333 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66922549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33461294 + 33461295.

It is an arithmetic number, because the mean of its divisors is an integer number (33461295).

Almost surely, 2^66922589 is an apocalyptic number.

It is an amenable number.

66922589 is a deficient number, since it is larger than the sum of its proper divisors (1).

66922589 is an equidigital number, since it uses as much as digits as its factorization.

66922589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 47.

The square root of 66922589 is about 8180.6227758038. The cubic root of 66922589 is about 405.9983276238.

The spelling of 66922589 in words is "sixty-six million, nine hundred twenty-two thousand, five hundred eighty-nine".