66822018 has 8 divisors (see below), whose sum is σ = 133644048. Its totient is φ = 22274004.

The previous prime is 66821999. The next prime is 66822047. The reversal of 66822018 is 81022866.

It is a sphenic number, since it is the product of 3 distinct primes.

66822018 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 66822018.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5568496 + ... + 5568507.

It is an arithmetic number, because the mean of its divisors is an integer number (16705506).

Almost surely, 2^66822018 is an apocalyptic number.

66822018 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66822018 is a wasteful number, since it uses less digits than its factorization.

66822018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11137008.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 66822018 is about 8174.4735610313. The cubic root of 66822018 is about 405.7948481042.

The spelling of 66822018 in words is "sixty-six million, eight hundred twenty-two thousand, eighteen".