666822412 has 12 divisors (see below), whose sum is σ = 1178269456. Its totient is φ = 330174000.

The previous prime is 666822407. The next prime is 666822419. The reversal of 666822412 is 214228666.

It is not an unprimeable number, because it can be changed into a prime (666822419) 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, 808839 + ... + 809662.

Almost surely, 2^666822412 is an apocalyptic number.

It is an amenable number.

666822412 is a deficient number, since it is larger than the sum of its proper divisors (511447044).

666822412 is a wasteful number, since it uses less digits than its factorization.

666822412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618608 (or 1618606 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 666822412 is about 25822.9047940002. The cubic root of 666822412 is about 873.6484874798.

The spelling of 666822412 in words is "six hundred sixty-six million, eight hundred twenty-two thousand, four hundred twelve".