66228956236 has 12 divisors (see below), whose sum is σ = 118727519400. Its totient is φ = 32306807840.

The previous prime is 66228956231. The next prime is 66228956243. The reversal of 66228956236 is 63265982266.

It is a super-2 number, since 2×66228956236² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66228956231) 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, 201917386 + ... + 201917713.

It is an arithmetic number, because the mean of its divisors is an integer number (9893959950).

Almost surely, 2^66228956236 is an apocalyptic number.

It is an amenable number.

66228956236 is a deficient number, since it is larger than the sum of its proper divisors (52498563164).

66228956236 is a wasteful number, since it uses less digits than its factorization.

66228956236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403835144 (or 403835142 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 55.

The spelling of 66228956236 in words is "sixty-six billion, two hundred twenty-eight million, nine hundred fifty-six thousand, two hundred thirty-six".