16100166506 has 32 divisors (see below), whose sum is σ = 25857876240. Its totient is φ = 7491649536.

The previous prime is 16100166503. The next prime is 16100166559. The reversal of 16100166506 is 60566100161.

It can be written as a sum of positive squares in 8 ways, for example, as 6210858481 + 9889308025 = 78809^2 + 99445^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16100166503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7020296 + ... + 7022588.

Almost surely, 2^16100166506 is an apocalyptic number.

16100166506 is a deficient number, since it is larger than the sum of its proper divisors (9757709734).

16100166506 is a wasteful number, since it uses less digits than its factorization.

16100166506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4538.

The product of its (nonzero) digits is 6480, while the sum is 32.

Adding to 16100166506 its reverse (60566100161), we get a palindrome (76666266667).

The spelling of 16100166506 in words is "sixteen billion, one hundred million, one hundred sixty-six thousand, five hundred six".