66775127 has 4 divisors (see below), whose sum is σ = 66878040. Its totient is φ = 66672216.

The previous prime is 66775123. The next prime is 66775153. The reversal of 66775127 is 72157766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66775127 - 2² = 66775123 is a prime.

It is a super-2 number, since 2×66775127² = 8917835171732258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66775123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50477 + ... + 51782.

It is an arithmetic number, because the mean of its divisors is an integer number (16719510).

Almost surely, 2^66775127 is an apocalyptic number.

66775127 is a deficient number, since it is larger than the sum of its proper divisors (102913).

66775127 is a wasteful number, since it uses less digits than its factorization.

66775127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102912.

The product of its digits is 123480, while the sum is 41.

The square root of 66775127 is about 8171.6049219232. The cubic root of 66775127 is about 405.6999064497.

The spelling of 66775127 in words is "sixty-six million, seven hundred seventy-five thousand, one hundred twenty-seven".