400666198 has 8 divisors (see below), whose sum is σ = 604827792. Its totient is φ = 199056936.

The previous prime is 400666171. The next prime is 400666207. The reversal of 400666198 is 891666004.

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

It is a self number, because there is not a number n which added to its sum of digits gives 400666198.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637690 + ... + 638317.

It is an arithmetic number, because the mean of its divisors is an integer number (75603474).

Almost surely, 2^400666198 is an apocalyptic number.

400666198 is a deficient number, since it is larger than the sum of its proper divisors (204161594).

400666198 is a wasteful number, since it uses less digits than its factorization.

400666198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276166.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 400666198 is about 20016.6480210848. The cubic root of 400666198 is about 737.2151219176.

It can be divided in two parts, 40066 and 6198, that added together give a palindrome (46264).

The spelling of 400666198 in words is "four hundred million, six hundred sixty-six thousand, one hundred ninety-eight".