66422070 has 144 divisors (see below), whose sum is σ = 204517872. Its totient is φ = 14826240.

The previous prime is 66422063. The next prime is 66422071. The reversal of 66422070 is 7022466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66422071) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 167112 + ... + 167508.

It is an arithmetic number, because the mean of its divisors is an integer number (1420263).

Almost surely, 2^66422070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66422070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102258936).

66422070 is an abundant number, since it is smaller than the sum of its proper divisors (138095802).

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

66422070 is a wasteful number, since it uses less digits than its factorization.

66422070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 66422070 is about 8149.9736195892. The cubic root of 66422070 is about 404.9836298825.

The spelling of 66422070 in words is "sixty-six million, four hundred twenty-two thousand, seventy".