166541530 has 8 divisors (see below), whose sum is σ = 299774772. Its totient is φ = 66616608.

The previous prime is 166541509. The next prime is 166541533. The reversal of 166541530 is 35145661.

It can be written as a sum of positive squares in 2 ways, for example, as 163405089 + 3136441 = 12783^2 + 1771^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 166541492 and 166541501.

It is not an unprimeable number, because it can be changed into a prime (166541533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8327067 + ... + 8327086.

Almost surely, 2^166541530 is an apocalyptic number.

166541530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166541530 is a deficient number, since it is larger than the sum of its proper divisors (133233242).

166541530 is a wasteful number, since it uses less digits than its factorization.

166541530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16654160.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 166541530 is about 12905.0970550399. The cubic root of 166541530 is about 550.1834429412.

It can be divided in two parts, 166 and 541530, that added together give a square (541696 = 736²).

The spelling of 166541530 in words is "one hundred sixty-six million, five hundred forty-one thousand, five hundred thirty".