66860467 has 2 divisors, whose sum is σ = 66860468. Its totient is φ = 66860466.

The previous prime is 66860429. The next prime is 66860477. The reversal of 66860467 is 76406866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66860467 - 2¹¹ = 66858419 is a prime.

It is not a weakly prime, because it can be changed into another prime (66860407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33430233 + 33430234.

It is an arithmetic number, because the mean of its divisors is an integer number (33430234).

Almost surely, 2^66860467 is an apocalyptic number.

66860467 is a deficient number, since it is larger than the sum of its proper divisors (1).

66860467 is an equidigital number, since it uses as much as digits as its factorization.

66860467 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 66860467 is about 8176.8249950699. The cubic root of 66860467 is about 405.8726638453.

The spelling of 66860467 in words is "sixty-six million, eight hundred sixty thousand, four hundred sixty-seven".