66363133 has 4 divisors (see below), whose sum is σ = 67981788. Its totient is φ = 64744480.

The previous prime is 66363131. The next prime is 66363137. The reversal of 66363133 is 33136366.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17614809 + 48748324 = 4197^2 + 6982^2 .

It is a cyclic number.

It is not a de Polignac number, because 66363133 - 2¹ = 66363131 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66363095 and 66363104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66363131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 809266 + ... + 809347.

It is an arithmetic number, because the mean of its divisors is an integer number (16995447).

Almost surely, 2^66363133 is an apocalyptic number.

It is an amenable number.

66363133 is a deficient number, since it is larger than the sum of its proper divisors (1618655).

66363133 is a wasteful number, since it uses less digits than its factorization.

66363133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618654.

The product of its digits is 17496, while the sum is 31.

The square root of 66363133 is about 8146.3570385787. The cubic root of 66363133 is about 404.8638123616.

Adding to 66363133 its reverse (33136366), we get a palindrome (99499499).

The spelling of 66363133 in words is "sixty-six million, three hundred sixty-three thousand, one hundred thirty-three".