66363667 has 4 divisors (see below), whose sum is σ = 66381336. Its totient is φ = 66346000.

The previous prime is 66363623. The next prime is 66363679. The reversal of 66363667 is 76636366.

66363667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76636366 = 2 ⋅38318183.

It is a cyclic number.

It is not a de Polignac number, because 66363667 - 2¹¹ = 66361619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66393667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 709 + ... + 11542.

It is an arithmetic number, because the mean of its divisors is an integer number (16595334).

Almost surely, 2^66363667 is an apocalyptic number.

66363667 is a deficient number, since it is larger than the sum of its proper divisors (17669).

66363667 is a wasteful number, since it uses less digits than its factorization.

66363667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17668.

The product of its digits is 489888, while the sum is 43.

The square root of 66363667 is about 8146.3898138992. The cubic root of 66363667 is about 404.8648982893.

The spelling of 66363667 in words is "sixty-six million, three hundred sixty-three thousand, six hundred sixty-seven".