16530506 has 8 divisors (see below), whose sum is σ = 24818724. Its totient is φ = 8257600.

The previous prime is 16530499. The next prime is 16530509. The reversal of 16530506 is 60503561.

It can be written as a sum of positive squares in 2 ways, for example, as 14100025 + 2430481 = 3755^2 + 1559^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16530509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 575 + ... + 5778.

Almost surely, 2^16530506 is an apocalyptic number.

16530506 is a deficient number, since it is larger than the sum of its proper divisors (8288218).

16530506 is a wasteful number, since it uses less digits than its factorization.

16530506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7656.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 16530506 is about 4065.7724973245. The cubic root of 16530506 is about 254.7389665095.

The spelling of 16530506 in words is "sixteen million, five hundred thirty thousand, five hundred six".