66201633 has 12 divisors (see below), whose sum is σ = 95968548. Its totient is φ = 43975680.

The previous prime is 66201631. The next prime is 66201677. The reversal of 66201633 is 33610266.

66201633 is a `hidden beast` number, since 6 + 6 + 20 + 1 + 633 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 56070144 + 10131489 = 7488^2 + 3183^2 .

It is not a de Polignac number, because 66201633 - 2¹ = 66201631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66201597 and 66201606.

It is not an unprimeable number, because it can be changed into a prime (66201631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10560 + ... + 15617.

It is an arithmetic number, because the mean of its divisors is an integer number (7997379).

Almost surely, 2^66201633 is an apocalyptic number.

It is an amenable number.

66201633 is a deficient number, since it is larger than the sum of its proper divisors (29766915).

66201633 is a wasteful number, since it uses less digits than its factorization.

66201633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26464 (or 26461 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 66201633 is about 8136.4385943728. The cubic root of 66201633 is about 404.5351227471.

Adding to 66201633 its reverse (33610266), we get a palindrome (99811899).

The spelling of 66201633 in words is "sixty-six million, two hundred one thousand, six hundred thirty-three".