161567663 has 8 divisors (see below), whose sum is σ = 170488800. Its totient is φ = 152804608.

The previous prime is 161567647. The next prime is 161567683. The reversal of 161567663 is 366765161.

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 161567663 - 2⁴ = 161567647 is a prime.

It is a super-2 number, since 2×161567663² = 52208219454563138, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161567663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161567633) 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, 37418 + ... + 41511.

It is an arithmetic number, because the mean of its divisors is an integer number (21311100).

Almost surely, 2^161567663 is an apocalyptic number.

161567663 is a deficient number, since it is larger than the sum of its proper divisors (8921137).

161567663 is an equidigital number, since it uses as much as digits as its factorization.

161567663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79041.

The product of its digits is 136080, while the sum is 41.

The square root of 161567663 is about 12710.9269134867. The cubic root of 161567663 is about 544.6508023144.

The spelling of 161567663 in words is "one hundred sixty-one million, five hundred sixty-seven thousand, six hundred sixty-three".