66928333 has 2 divisors, whose sum is σ = 66928334. Its totient is φ = 66928332.

The previous prime is 66928327. The next prime is 66928387. The reversal of 66928333 is 33382966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66634569 + 293764 = 8163^2 + 542^2 .

It is a cyclic number.

It is not a de Polignac number, because 66928333 - 2⁹ = 66927821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66928313) 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, 33464166 + 33464167.

It is an arithmetic number, because the mean of its divisors is an integer number (33464167).

Almost surely, 2^66928333 is an apocalyptic number.

It is an amenable number.

66928333 is a deficient number, since it is larger than the sum of its proper divisors (1).

66928333 is an equidigital number, since it uses as much as digits as its factorization.

66928333 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 40.

The square root of 66928333 is about 8180.9738417868. The cubic root of 66928333 is about 406.0099429728.

The spelling of 66928333 in words is "sixty-six million, nine hundred twenty-eight thousand, three hundred thirty-three".