166205530 has 8 divisors (see below), whose sum is σ = 299169972. Its totient is φ = 66482208.

The previous prime is 166205519. The next prime is 166205569. The reversal of 166205530 is 35502661.

It can be written as a sum of positive squares in 2 ways, for example, as 165714129 + 491401 = 12873^2 + 701^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8310267 + ... + 8310286.

Almost surely, 2^166205530 is an apocalyptic number.

166205530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166205530 is a deficient number, since it is larger than the sum of its proper divisors (132964442).

166205530 is a wasteful number, since it uses less digits than its factorization.

166205530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16620560.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 166205530 is about 12892.0723702592. The cubic root of 166205530 is about 549.8131927565.

The spelling of 166205530 in words is "one hundred sixty-six million, two hundred five thousand, five hundred thirty".