66669683 has 2 divisors, whose sum is σ = 66669684. Its totient is φ = 66669682.

The previous prime is 66669619. The next prime is 66669719. The reversal of 66669683 is 38696666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66669683 - 2⁶ = 66669619 is a prime.

It is not a weakly prime, because it can be changed into another prime (66669583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33334841 + 33334842.

It is an arithmetic number, because the mean of its divisors is an integer number (33334842).

Almost surely, 2^66669683 is an apocalyptic number.

66669683 is a deficient number, since it is larger than the sum of its proper divisors (1).

66669683 is an equidigital number, since it uses as much as digits as its factorization.

66669683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 50.

The square root of 66669683 is about 8165.1505191270. The cubic root of 66669683 is about 405.4862482622.

The spelling of 66669683 in words is "sixty-six million, six hundred sixty-nine thousand, six hundred eighty-three".