66673499 has 2 divisors, whose sum is σ = 66673500. Its totient is φ = 66673498.

The previous prime is 66673483. The next prime is 66673501. The reversal of 66673499 is 99437666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66673499 - 2⁴ = 66673483 is a prime.

Together with 66673501, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66673429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33336749 + 33336750.

It is an arithmetic number, because the mean of its divisors is an integer number (33336750).

Almost surely, 2^66673499 is an apocalyptic number.

66673499 is a deficient number, since it is larger than the sum of its proper divisors (1).

66673499 is an equidigital number, since it uses as much as digits as its factorization.

66673499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 50.

The square root of 66673499 is about 8165.3841918185. The cubic root of 66673499 is about 405.4939844422.

The spelling of 66673499 in words is "sixty-six million, six hundred seventy-three thousand, four hundred ninety-nine".