66363399 has 6 divisors (see below), whose sum is σ = 95858256. Its totient is φ = 44242260.

The previous prime is 66363391. The next prime is 66363413. The reversal of 66363399 is 99336366.

66363399 is a `hidden beast` number, since 6 + 6 + 3 + 633 + 9 + 9 = 666.

It is not a de Polignac number, because 66363399 - 2³ = 66363391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66363391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3686847 + ... + 3686864.

It is an arithmetic number, because the mean of its divisors is an integer number (15976376).

Almost surely, 2^66363399 is an apocalyptic number.

66363399 is a deficient number, since it is larger than the sum of its proper divisors (29494857).

66363399 is a wasteful number, since it uses less digits than its factorization.

66363399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7373717 (or 7373714 counting only the distinct ones).

The product of its digits is 472392, while the sum is 45.

The square root of 66363399 is about 8146.3733648784. The cubic root of 66363399 is about 404.8643532926.

The spelling of 66363399 in words is "sixty-six million, three hundred sixty-three thousand, three hundred ninety-nine".