166806036 has 18 divisors (see below), whose sum is σ = 421648682. Its totient is φ = 55602000.

The previous prime is 166806019. The next prime is 166806043. The reversal of 166806036 is 630608661.

It can be written as a sum of positive squares in only one way, i.e., 91011600 + 75794436 = 9540^2 + 8706^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4633501 = 166806036 / (1 + 6 + 6 + 8 + 0 + 6 + 0 + 3 + 6).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2316715 + ... + 2316786.

Almost surely, 2^166806036 is an apocalyptic number.

It is an amenable number.

166806036 is an abundant number, since it is smaller than the sum of its proper divisors (254842646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166806036 is a wasteful number, since it uses less digits than its factorization.

166806036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4633511 (or 4633506 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 166806036 is about 12915.3411104779. The cubic root of 166806036 is about 550.4745612114.

The spelling of 166806036 in words is "one hundred sixty-six million, eight hundred six thousand, thirty-six".