66422512 has 20 divisors (see below), whose sum is σ = 138593560. Its totient is φ = 30656448.

The previous prime is 66422479. The next prime is 66422513. The reversal of 66422512 is 21522466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66422513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159462 + ... + 159877.

It is an arithmetic number, because the mean of its divisors is an integer number (6929678).

Almost surely, 2^66422512 is an apocalyptic number.

It is an amenable number.

66422512 is an abundant number, since it is smaller than the sum of its proper divisors (72171048).

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

66422512 is a wasteful number, since it uses less digits than its factorization.

66422512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319360 (or 319354 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 66422512 is about 8150.0007361963. Note that the first 3 decimals coincide. The cubic root of 66422512 is about 404.9845281901.

Adding to 66422512 its reverse (21522466), we get a palindrome (87944978).

The spelling of 66422512 in words is "sixty-six million, four hundred twenty-two thousand, five hundred twelve".