8161663 has 8 divisors (see below), whose sum is σ = 8346240. Its totient is φ = 7979160.

The previous prime is 8161661. The next prime is 8161667. The reversal of 8161663 is 3661618.

8161663 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 8161663 - 2¹ = 8161661 is a prime.

It is a super-2 number, since 2×8161663² = 133225485851138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161661) 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, 9456 + ... + 10282.

It is an arithmetic number, because the mean of its divisors is an integer number (1043280).

Almost surely, 2^8161663 is an apocalyptic number.

8161663 is a deficient number, since it is larger than the sum of its proper divisors (184577).

8161663 is a wasteful number, since it uses less digits than its factorization.

8161663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037.

The product of its digits is 5184, while the sum is 31.

The square root of 8161663 is about 2856.8624398105. The cubic root of 8161663 is about 201.3382175645.

The spelling of 8161663 in words is "eight million, one hundred sixty-one thousand, six hundred sixty-three".