66674507 has 2 divisors, whose sum is σ = 66674508. Its totient is φ = 66674506.

The previous prime is 66674501. The next prime is 66674513. The reversal of 66674507 is 70547666.

It is a balanced prime because it is at equal distance from previous prime (66674501) and next prime (66674513).

It is a cyclic number.

It is not a de Polignac number, because 66674507 - 2¹⁰ = 66673483 is a prime.

It is not a weakly prime, because it can be changed into another prime (66674501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33337253 + 33337254.

It is an arithmetic number, because the mean of its divisors is an integer number (33337254).

Almost surely, 2^66674507 is an apocalyptic number.

66674507 is a deficient number, since it is larger than the sum of its proper divisors (1).

66674507 is an equidigital number, since it uses as much as digits as its factorization.

66674507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 66674507 is about 8165.4459155640. The cubic root of 66674507 is about 405.4960279122.

The spelling of 66674507 in words is "sixty-six million, six hundred seventy-four thousand, five hundred seven".