161166437 has 2 divisors, whose sum is σ = 161166438. Its totient is φ = 161166436.

The previous prime is 161166433. The next prime is 161166457. The reversal of 161166437 is 734661161.

161166437 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121903681 + 39262756 = 11041^2 + 6266^2 .

It is a cyclic number.

It is not a de Polignac number, because 161166437 - 2² = 161166433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161166397 and 161166406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161166433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80583218 + 80583219.

It is an arithmetic number, because the mean of its divisors is an integer number (80583219).

Almost surely, 2^161166437 is an apocalyptic number.

It is an amenable number.

161166437 is a deficient number, since it is larger than the sum of its proper divisors (1).

161166437 is an equidigital number, since it uses as much as digits as its factorization.

161166437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 161166437 is about 12695.1343829043. The cubic root of 161166437 is about 544.1995791731.

The spelling of 161166437 in words is "one hundred sixty-one million, one hundred sixty-six thousand, four hundred thirty-seven".