16166555001 has 18 divisors (see below), whose sum is σ = 23585318510. Its totient is φ = 10670932800.

The previous prime is 16166554969. The next prime is 16166555017. The reversal of 16166555001 is 10055566161.

It can be written as a sum of positive squares in 3 ways, for example, as 5531789376 + 10634765625 = 74376^2 + 103125^2 .

It is not a de Polignac number, because 16166555001 - 2⁵ = 16166554969 is a prime.

It is a super-2 number, since 2×16166555001² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16166555051) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3765 + ... + 179853.

Almost surely, 2^16166555001 is an apocalyptic number.

It is an amenable number.

16166555001 is a deficient number, since it is larger than the sum of its proper divisors (7418763509).

16166555001 is a wasteful number, since it uses less digits than its factorization.

16166555001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176297 (or 176193 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 16166555001 in words is "sixteen billion, one hundred sixty-six million, five hundred fifty-five thousand, one".