66836833 has 6 divisors (see below), whose sum is σ = 77749026. Its totient is φ = 57288672.

The previous prime is 66836831. The next prime is 66836839. The reversal of 66836833 is 33863866.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 65820769 + 1016064 = 8113^2 + 1008^2 .

It is not a de Polignac number, because 66836833 - 2¹ = 66836831 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66836833.

It is not an unprimeable number, because it can be changed into a prime (66836831) 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 5 ways as a sum of consecutive naturals, for example, 681960 + ... + 682057.

It is an arithmetic number, because the mean of its divisors is an integer number (12958171).

Almost surely, 2^66836833 is an apocalyptic number.

It is an amenable number.

66836833 is a deficient number, since it is larger than the sum of its proper divisors (10912193).

66836833 is a wasteful number, since it uses less digits than its factorization.

66836833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364031 (or 1364024 counting only the distinct ones).

The product of its digits is 373248, while the sum is 43.

The square root of 66836833 is about 8175.3796853724. The cubic root of 66836833 is about 405.8248352582.

The spelling of 66836833 in words is "sixty-six million, eight hundred thirty-six thousand, eight hundred thirty-three".