198216466 has 12 divisors (see below), whose sum is σ = 345867678. Its totient is φ = 84949872.

The previous prime is 198216419. The next prime is 198216497. The reversal of 198216466 is 664612891.

It can be written as a sum of positive squares in only one way, i.e., 170433025 + 27783441 = 13055^2 + 5271^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1011211 + ... + 1011406.

Almost surely, 2^198216466 is an apocalyptic number.

198216466 is a deficient number, since it is larger than the sum of its proper divisors (147651212).

198216466 is a wasteful number, since it uses less digits than its factorization.

198216466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2022633 (or 2022626 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 198216466 is about 14078.9369627114. The cubic root of 198216466 is about 583.0599928260.

The spelling of 198216466 in words is "one hundred ninety-eight million, two hundred sixteen thousand, four hundred sixty-six".