66596407 has 2 divisors, whose sum is σ = 66596408. Its totient is φ = 66596406.

The previous prime is 66596399. The next prime is 66596419. The reversal of 66596407 is 70469566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66596407 - 2³ = 66596399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66596107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33298203 + 33298204.

It is an arithmetic number, because the mean of its divisors is an integer number (33298204).

Almost surely, 2^66596407 is an apocalyptic number.

66596407 is a deficient number, since it is larger than the sum of its proper divisors (1).

66596407 is an equidigital number, since it uses as much as digits as its factorization.

66596407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 66596407 is about 8160.6621667607. The cubic root of 66596407 is about 405.3376384735.

The spelling of 66596407 in words is "sixty-six million, five hundred ninety-six thousand, four hundred seven".