66670319 has 2 divisors, whose sum is σ = 66670320. Its totient is φ = 66670318.

The previous prime is 66670313. The next prime is 66670327. The reversal of 66670319 is 91307666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66670319 - 2⁸ = 66670063 is a prime.

It is a super-2 number, since 2×66670319² = 8889862871123522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66670313) 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, 33335159 + 33335160.

It is an arithmetic number, because the mean of its divisors is an integer number (33335160).

Almost surely, 2^66670319 is an apocalyptic number.

66670319 is a deficient number, since it is larger than the sum of its proper divisors (1).

66670319 is an equidigital number, since it uses as much as digits as its factorization.

66670319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 66670319 is about 8165.1894650400. The cubic root of 66670319 is about 405.4875376460.

The spelling of 66670319 in words is "sixty-six million, six hundred seventy thousand, three hundred nineteen".