66363775 has 12 divisors (see below), whose sum is σ = 82420072. Its totient is φ = 53007840.

The previous prime is 66363769. The next prime is 66363779. The reversal of 66363775 is 57736366.

It is not a de Polignac number, because 66363775 - 2⁹ = 66363263 is a prime.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66363779) 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 11 ways as a sum of consecutive naturals, for example, 17989 + ... + 21361.

Almost surely, 2^66363775 is an apocalyptic number.

66363775 is a deficient number, since it is larger than the sum of its proper divisors (16056297).

66363775 is a wasteful number, since it uses less digits than its factorization.

66363775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170 (or 4165 counting only the distinct ones).

The product of its digits is 476280, while the sum is 43.

The square root of 66363775 is about 8146.3964425996. The cubic root of 66363775 is about 404.8651179144.

The spelling of 66363775 in words is "sixty-six million, three hundred sixty-three thousand, seven hundred seventy-five".