66383671 has 2 divisors, whose sum is σ = 66383672. Its totient is φ = 66383670.

The previous prime is 66383641. The next prime is 66383687. The reversal of 66383671 is 17638366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66383671 - 2¹³ = 66375479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66383641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33191835 + 33191836.

It is an arithmetic number, because the mean of its divisors is an integer number (33191836).

Almost surely, 2^66383671 is an apocalyptic number.

66383671 is a deficient number, since it is larger than the sum of its proper divisors (1).

66383671 is an equidigital number, since it uses as much as digits as its factorization.

66383671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 40.

The square root of 66383671 is about 8147.6175045224. The cubic root of 66383671 is about 404.9055736778.

It can be divided in two parts, 66 and 383671, that multiplied together give a triangular number (25322286 = T₇₁₁₆).

The spelling of 66383671 in words is "sixty-six million, three hundred eighty-three thousand, six hundred seventy-one".