66596671 has 2 divisors, whose sum is σ = 66596672. Its totient is φ = 66596670.

The previous prime is 66596639. The next prime is 66596687. The reversal of 66596671 is 17669566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66596671 - 2⁵ = 66596639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66536671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33298335 + 33298336.

It is an arithmetic number, because the mean of its divisors is an integer number (33298336).

Almost surely, 2^66596671 is an apocalyptic number.

66596671 is a deficient number, since it is larger than the sum of its proper divisors (1).

66596671 is an equidigital number, since it uses as much as digits as its factorization.

66596671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 46.

The square root of 66596671 is about 8160.6783419027. The cubic root of 66596671 is about 405.3381740829.

It can be divided in two parts, 665 and 96671, that added together give a cube (97336 = 46³).

The spelling of 66596671 in words is "sixty-six million, five hundred ninety-six thousand, six hundred seventy-one".