13161663 has 8 divisors (see below), whose sum is σ = 19498800. Its totient is φ = 8774424.

The previous prime is 13161601. The next prime is 13161703. The reversal of 13161663 is 36616131.

It is a happy number.

It is not a de Polignac number, because 13161663 - 2⁹ = 13161151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 487469 = 13161663 / (1 + 3 + 1 + 6 + 1 + 6 + 6 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13168663) 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, 243708 + ... + 243761.

It is an arithmetic number, because the mean of its divisors is an integer number (2437350).

Almost surely, 2^13161663 is an apocalyptic number.

13161663 is a deficient number, since it is larger than the sum of its proper divisors (6337137).

13161663 is an equidigital number, since it uses as much as digits as its factorization.

13161663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487478 (or 487472 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 13161663 is about 3627.9006325973. The cubic root of 13161663 is about 236.1041326821.

Adding to 13161663 its reverse (36616131), we get a palindrome (49777794).

It can be divided in two parts, 13161 and 663, that added together give a cube (13824 = 24³).

The spelling of 13161663 in words is "thirteen million, one hundred sixty-one thousand, six hundred sixty-three".