401665116 has 24 divisors (see below), whose sum is σ = 937560960. Its totient is φ = 133839472.

The previous prime is 401665093. The next prime is 401665127. The reversal of 401665116 is 611566104.

It is a super-2 number, since 2×401665116² = 322669730822586912, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 45625 + ... + 53711.

It is an arithmetic number, because the mean of its divisors is an integer number (39065040).

Almost surely, 2^401665116 is an apocalyptic number.

It is an amenable number.

401665116 is an abundant number, since it is smaller than the sum of its proper divisors (535895844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401665116 is a wasteful number, since it uses less digits than its factorization.

401665116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12233 (or 12231 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 401665116 is about 20041.5846678849. The cubic root of 401665116 is about 737.8272743005.

The spelling of 401665116 in words is "four hundred one million, six hundred sixty-five thousand, one hundred sixteen".