66422020 has 24 divisors (see below), whose sum is σ = 159413184. Its totient is φ = 22773216.

The previous prime is 66422003. The next prime is 66422039. The reversal of 66422020 is 2022466.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66421982 and 66422000.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237082 + ... + 237361.

It is an arithmetic number, because the mean of its divisors is an integer number (6642216).

Almost surely, 2^66422020 is an apocalyptic number.

It is an amenable number.

66422020 is an abundant number, since it is smaller than the sum of its proper divisors (92991164).

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

66422020 is a wasteful number, since it uses less digits than its factorization.

66422020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474459 (or 474457 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 66422020 is about 8149.9705520940. The cubic root of 66422020 is about 404.9835282637.

Adding to 66422020 its reverse (2022466), we get a palindrome (68444486).

The spelling of 66422020 in words is "sixty-six million, four hundred twenty-two thousand, twenty".