161166643 has 8 divisors (see below), whose sum is σ = 175919040. Its totient is φ = 146431080.

The previous prime is 161166641. The next prime is 161166667. The reversal of 161166643 is 346661161.

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 161166643 - 2¹ = 161166641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161166599 and 161166608.

It is not an unprimeable number, because it can be changed into a prime (161166641) 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, 24168 + ... + 30106.

It is an arithmetic number, because the mean of its divisors is an integer number (21989880).

Almost surely, 2^161166643 is an apocalyptic number.

161166643 is a deficient number, since it is larger than the sum of its proper divisors (14752397).

161166643 is a wasteful number, since it uses less digits than its factorization.

161166643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8417.

The product of its digits is 15552, while the sum is 34.

The square root of 161166643 is about 12695.1424962463. The cubic root of 161166643 is about 544.1998110350.

The spelling of 161166643 in words is "one hundred sixty-one million, one hundred sixty-six thousand, six hundred forty-three".