66381127 has 2 divisors, whose sum is σ = 66381128. Its totient is φ = 66381126.

The previous prime is 66381113. The next prime is 66381143. The reversal of 66381127 is 72118366.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66381127 is a prime.

It is a super-3 number, since 3×66381127³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66381092 and 66381101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66381187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33190563 + 33190564.

It is an arithmetic number, because the mean of its divisors is an integer number (33190564).

Almost surely, 2^66381127 is an apocalyptic number.

66381127 is a deficient number, since it is larger than the sum of its proper divisors (1).

66381127 is an equidigital number, since it uses as much as digits as its factorization.

66381127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 66381127 is about 8147.4613837686. The cubic root of 66381127 is about 404.9004012565.

The spelling of 66381127 in words is "sixty-six million, three hundred eighty-one thousand, one hundred twenty-seven".