166806037 has 4 divisors (see below), whose sum is σ = 166858060. Its totient is φ = 166754016.

The previous prime is 166806019. The next prime is 166806043. The reversal of 166806037 is 730608661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 730608661 = 1871 ⋅390491.

It can be written as a sum of positive squares in 2 ways, for example, as 83010321 + 83795716 = 9111^2 + 9154^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166806037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166805987 and 166806005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166806067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20862 + ... + 27727.

It is an arithmetic number, because the mean of its divisors is an integer number (41714515).

Almost surely, 2^166806037 is an apocalyptic number.

It is an amenable number.

166806037 is a deficient number, since it is larger than the sum of its proper divisors (52023).

166806037 is an equidigital number, since it uses as much as digits as its factorization.

166806037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52022.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 166806037 is about 12915.3411491915. The cubic root of 166806037 is about 550.4745623114.

The spelling of 166806037 in words is "one hundred sixty-six million, eight hundred six thousand, thirty-seven".