198441661 has 8 divisors (see below), whose sum is σ = 221088384. Its totient is φ = 176562720.

The previous prime is 198441613. The next prime is 198441701. The reversal of 198441661 is 166144891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198441661 - 2¹⁵ = 198408893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198441611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191400 + ... + 192433.

It is an arithmetic number, because the mean of its divisors is an integer number (27636048).

Almost surely, 2^198441661 is an apocalyptic number.

198441661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

198441661 is a deficient number, since it is larger than the sum of its proper divisors (22646723).

198441661 is a wasteful number, since it uses less digits than its factorization.

198441661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383891.

The product of its digits is 41472, while the sum is 40.

The square root of 198441661 is about 14086.9322778240. The cubic root of 198441661 is about 583.2807153264.

The spelling of 198441661 in words is "one hundred ninety-eight million, four hundred forty-one thousand, six hundred sixty-one".