66828042 has 12 divisors (see below), whose sum is σ = 144794130. Its totient is φ = 22276008.

The previous prime is 66828023. The next prime is 66828043. The reversal of 66828042 is 24082866.

It can be written as a sum of positive squares in only one way, i.e., 66732561 + 95481 = 8169^2 + 309^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66827988 and 66828006.

It is not an unprimeable number, because it can be changed into a prime (66828043) 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, 1856317 + ... + 1856352.

Almost surely, 2^66828042 is an apocalyptic number.

66828042 is an abundant number, since it is smaller than the sum of its proper divisors (77966088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66828042 is a wasteful number, since it uses less digits than its factorization.

66828042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3712677 (or 3712674 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 66828042 is about 8174.8420168221. The cubic root of 66828042 is about 405.8070418630.

The spelling of 66828042 in words is "sixty-six million, eight hundred twenty-eight thousand, forty-two".