36166621 has 4 divisors (see below), whose sum is σ = 36409500. Its totient is φ = 35923744.

The previous prime is 36166607. The next prime is 36166631. The reversal of 36166621 is 12666163.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12666163 = 97 ⋅130579.

It can be written as a sum of positive squares in 2 ways, for example, as 9272025 + 26894596 = 3045^2 + 5186^2 .

It is a cyclic number.

It is not a de Polignac number, because 36166621 - 2⁵ = 36166589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36166601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121216 + ... + 121513.

It is an arithmetic number, because the mean of its divisors is an integer number (9102375).

Almost surely, 2^36166621 is an apocalyptic number.

It is an amenable number.

36166621 is a deficient number, since it is larger than the sum of its proper divisors (242879).

36166621 is a wasteful number, since it uses less digits than its factorization.

36166621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242878.

The product of its digits is 7776, while the sum is 31.

The square root of 36166621 is about 6013.8690541115. The cubic root of 36166621 is about 330.7013580378.

The spelling of 36166621 in words is "thirty-six million, one hundred sixty-six thousand, six hundred twenty-one".