66811246 has 16 divisors (see below), whose sum is σ = 102412800. Its totient is φ = 32679288.

The previous prime is 66811243. The next prime is 66811289. The reversal of 66811246 is 64211866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66811243) 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, 25045 + ... + 27583.

It is an arithmetic number, because the mean of its divisors is an integer number (6400800).

Almost surely, 2^66811246 is an apocalyptic number.

66811246 is a deficient number, since it is larger than the sum of its proper divisors (35601554).

66811246 is a wasteful number, since it uses less digits than its factorization.

66811246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823.

The product of its digits is 13824, while the sum is 34.

The square root of 66811246 is about 8173.8146541257. The cubic root of 66811246 is about 405.7730416341.

The spelling of 66811246 in words is "sixty-six million, eight hundred eleven thousand, two hundred forty-six".