401165663 has 8 divisors (see below), whose sum is σ = 404844000. Its totient is φ = 397500768.

The previous prime is 401165651. The next prime is 401165683. The reversal of 401165663 is 366561104.

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 401165663 - 2¹² = 401161567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401165683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62345 + ... + 68477.

It is an arithmetic number, because the mean of its divisors is an integer number (50605500).

Almost surely, 2^401165663 is an apocalyptic number.

401165663 is a deficient number, since it is larger than the sum of its proper divisors (3678337).

401165663 is a wasteful number, since it uses less digits than its factorization.

401165663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6721.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 401165663 is about 20029.1203750939. The cubic root of 401165663 is about 737.5213288096.

The spelling of 401165663 in words is "four hundred one million, one hundred sixty-five thousand, six hundred sixty-three".