166169837 has 2 divisors, whose sum is σ = 166169838. Its totient is φ = 166169836.

The previous prime is 166169831. The next prime is 166169851. The reversal of 166169837 is 738961661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162537001 + 3632836 = 12749^2 + 1906^2 .

It is a cyclic number.

It is not a de Polignac number, because 166169837 - 2⁴ = 166169821 is a prime.

It is a super-2 number, since 2×166169837² = 55224829457213138, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166169791 and 166169800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166169831) 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 as a sum of consecutive naturals, namely, 83084918 + 83084919.

It is an arithmetic number, because the mean of its divisors is an integer number (83084919).

Almost surely, 2^166169837 is an apocalyptic number.

It is an amenable number.

166169837 is a deficient number, since it is larger than the sum of its proper divisors (1).

166169837 is an equidigital number, since it uses as much as digits as its factorization.

166169837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 47.

The square root of 166169837 is about 12890.6879956036. The cubic root of 166169837 is about 549.7738320781.

The spelling of 166169837 in words is "one hundred sixty-six million, one hundred sixty-nine thousand, eight hundred thirty-seven".