811232216066 has 4 divisors (see below), whose sum is σ = 1216848324102. Its totient is φ = 405616108032.

The previous prime is 811232216021. The next prime is 811232216089. The reversal of 811232216066 is 660612232118.

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., 778769185441 + 32463030625 = 882479^2 + 180175^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202808054015 + ... + 202808054018.

Almost surely, 2^811232216066 is an apocalyptic number.

811232216066 is a deficient number, since it is larger than the sum of its proper divisors (405616108036).

811232216066 is a wasteful number, since it uses less digits than its factorization.

811232216066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405616108035.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 811232216066 in words is "eight hundred eleven billion, two hundred thirty-two million, two hundred sixteen thousand, sixty-six".