223638311066 has 4 divisors (see below), whose sum is σ = 335457466602. Its totient is φ = 111819155532.

The previous prime is 223638310997. The next prime is 223638311069. The reversal of 223638311066 is 660113836322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 176883330625 + 46754980441 = 420575^2 + 216229^2 .

It is not an unprimeable number, because it can be changed into a prime (223638311069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55909577765 + ... + 55909577768.

Almost surely, 2^223638311066 is an apocalyptic number.

223638311066 is a deficient number, since it is larger than the sum of its proper divisors (111819155536).

223638311066 is a wasteful number, since it uses less digits than its factorization.

223638311066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111819155535.

The product of its (nonzero) digits is 186624, while the sum is 41.

The spelling of 223638311066 in words is "two hundred twenty-three billion, six hundred thirty-eight million, three hundred eleven thousand, sixty-six".