66633406 has 16 divisors (see below), whose sum is σ = 114831360. Its totient is φ = 28406520.

The previous prime is 66633397. The next prime is 66633407. The reversal of 66633406 is 60433666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66633407) 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 7 ways as a sum of consecutive naturals, for example, 9786 + ... + 15133.

It is an arithmetic number, because the mean of its divisors is an integer number (7176960).

Almost surely, 2^66633406 is an apocalyptic number.

66633406 is a deficient number, since it is larger than the sum of its proper divisors (48197954).

66633406 is a wasteful number, since it uses less digits than its factorization.

66633406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25119.

The product of its (nonzero) digits is 46656, while the sum is 34.

The square root of 66633406 is about 8162.9287636240. The cubic root of 66633406 is about 405.4126891231.

The spelling of 66633406 in words is "sixty-six million, six hundred thirty-three thousand, four hundred six".