401668111 has 8 divisors (see below), whose sum is σ = 433100304. Its totient is φ = 370312320.

The previous prime is 401668109. The next prime is 401668121. The reversal of 401668111 is 111866104.

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 401668111 - 2¹ = 401668109 is a prime.

It is a super-2 number, since 2×401668111² = 322674542788616642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401668111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401668121) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7930 + ... + 29431.

It is an arithmetic number, because the mean of its divisors is an integer number (54137538).

Almost surely, 2^401668111 is an apocalyptic number.

401668111 is a deficient number, since it is larger than the sum of its proper divisors (31432193).

401668111 is a wasteful number, since it uses less digits than its factorization.

401668111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38201.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 401668111 is about 20041.6593873861. The cubic root of 401668111 is about 737.8291081558.

It can be divided in two parts, 4016 and 68111, that added together give a palindrome (72127).

The spelling of 401668111 in words is "four hundred one million, six hundred sixty-eight thousand, one hundred eleven".