66534446 has 24 divisors (see below), whose sum is σ = 113833944. Its totient is φ = 28922960.

The previous prime is 66534437. The next prime is 66534449. The reversal of 66534446 is 64443566.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66534449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8780 + ... + 14496.

It is an arithmetic number, because the mean of its divisors is an integer number (4743081).

Almost surely, 2^66534446 is an apocalyptic number.

66534446 is a deficient number, since it is larger than the sum of its proper divisors (47299498).

66534446 is a wasteful number, since it uses less digits than its factorization.

66534446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5776 (or 5753 counting only the distinct ones).

The product of its digits is 207360, while the sum is 38.

The square root of 66534446 is about 8156.8649614910. The cubic root of 66534446 is about 405.2118913570.

The spelling of 66534446 in words is "sixty-six million, five hundred thirty-four thousand, four hundred forty-six".