66858683 has 2 divisors, whose sum is σ = 66858684. Its totient is φ = 66858682.

The previous prime is 66858647. The next prime is 66858689. The reversal of 66858683 is 38685866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66858683 - 2¹⁴ = 66842299 is a prime.

It is not a weakly prime, because it can be changed into another prime (66858689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33429341 + 33429342.

It is an arithmetic number, because the mean of its divisors is an integer number (33429342).

Almost surely, 2^66858683 is an apocalyptic number.

66858683 is a deficient number, since it is larger than the sum of its proper divisors (1).

66858683 is an equidigital number, since it uses as much as digits as its factorization.

66858683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1658880, while the sum is 50.

The square root of 66858683 is about 8176.7159055455. The cubic root of 66858683 is about 405.8690539230.

The spelling of 66858683 in words is "sixty-six million, eight hundred fifty-eight thousand, six hundred eighty-three".