66885822 has 24 divisors (see below), whose sum is σ = 147377880. Its totient is φ = 21917040.

The previous prime is 66885821. The next prime is 66885839. The reversal of 66885822 is 22858866.

66885822 is a `hidden beast` number, since 6 + 68 + 8 + 582 + 2 = 666.

It is a super-3 number, since 3×66885822³ (a number of 24 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66885821) 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, 30429 + ... + 32552.

It is an arithmetic number, because the mean of its divisors is an integer number (6140745).

Almost surely, 2^66885822 is an apocalyptic number.

66885822 is an abundant number, since it is smaller than the sum of its proper divisors (80492058).

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

66885822 is a wasteful number, since it uses less digits than its factorization.

66885822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63048 (or 63045 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 66885822 is about 8178.3752665184. The cubic root of 66885822 is about 405.9239627233.

The spelling of 66885822 in words is "sixty-six million, eight hundred eighty-five thousand, eight hundred twenty-two".