66382769287 has 2 divisors, whose sum is σ = 66382769288. Its totient is φ = 66382769286.

The previous prime is 66382769249. The next prime is 66382769329. The reversal of 66382769287 is 78296728366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66382769287 - 2²³ = 66374380679 is a prime.

It is a super-2 number, since 2×66382769287² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66382769587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33191384643 + 33191384644.

It is an arithmetic number, because the mean of its divisors is an integer number (33191384644).

Almost surely, 2^66382769287 is an apocalyptic number.

66382769287 is a deficient number, since it is larger than the sum of its proper divisors (1).

66382769287 is an equidigital number, since it uses as much as digits as its factorization.

66382769287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73156608, while the sum is 64.

The spelling of 66382769287 in words is "sixty-six billion, three hundred eighty-two million, seven hundred sixty-nine thousand, two hundred eighty-seven".