66228442608 has 40 divisors (see below), whose sum is σ = 172238418000. Its totient is φ = 21927983104.

The previous prime is 66228442607. The next prime is 66228442627. The reversal of 66228442608 is 80624482266.

It is a happy number.

It is a super-2 number, since 2×66228442608² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66228442607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4622913 + ... + 4637216.

It is an arithmetic number, because the mean of its divisors is an integer number (4305960450).

Almost surely, 2^66228442608 is an apocalyptic number.

It is an amenable number.

66228442608 is an abundant number, since it is smaller than the sum of its proper divisors (106009975392).

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

66228442608 is a wasteful number, since it uses less digits than its factorization.

66228442608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9260289 (or 9260283 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 48.

The spelling of 66228442608 in words is "sixty-six billion, two hundred twenty-eight million, four hundred forty-two thousand, six hundred eight".