166141505 has 8 divisors (see below), whose sum is σ = 200147112. Its totient is φ = 132395008.

The previous prime is 166141501. The next prime is 166141513. The reversal of 166141505 is 505141661.

166141505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 51394561 + 114746944 = 7169^2 + 10712^2 .

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 166141505 - 2² = 166141501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166141501) 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, 63362 + ... + 65931.

It is an arithmetic number, because the mean of its divisors is an integer number (25018389).

Almost surely, 2^166141505 is an apocalyptic number.

It is an amenable number.

166141505 is a deficient number, since it is larger than the sum of its proper divisors (34005607).

166141505 is a wasteful number, since it uses less digits than its factorization.

166141505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129555.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 166141505 is about 12889.5890159462. The cubic root of 166141505 is about 549.7425847755.

The spelling of 166141505 in words is "one hundred sixty-six million, one hundred forty-one thousand, five hundred five".