66573699407 has 2 divisors, whose sum is σ = 66573699408. Its totient is φ = 66573699406.

The previous prime is 66573699389. The next prime is 66573699481. The reversal of 66573699407 is 70499637566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66573699407 - 2⁸ = 66573699151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66573699407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66573692407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33286849703 + 33286849704.

It is an arithmetic number, because the mean of its divisors is an integer number (33286849704).

Almost surely, 2^66573699407 is an apocalyptic number.

66573699407 is a deficient number, since it is larger than the sum of its proper divisors (1).

66573699407 is an equidigital number, since it uses as much as digits as its factorization.

66573699407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51438240, while the sum is 62.

The spelling of 66573699407 in words is "sixty-six billion, five hundred seventy-three million, six hundred ninety-nine thousand, four hundred seven".