166163837 has 4 divisors (see below), whose sum is σ = 189901536. Its totient is φ = 142426140.

The previous prime is 166163821. The next prime is 166163839. The reversal of 166163837 is 738361661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 738361661 = 41 ⋅18008821.

It is a cyclic number.

It is not a de Polignac number, because 166163837 - 2⁴ = 166163821 is a prime.

It is a super-2 number, since 2×166163837² = 55220841453125138, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166163794 and 166163803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166163839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11868839 + ... + 11868852.

It is an arithmetic number, because the mean of its divisors is an integer number (47475384).

Almost surely, 2^166163837 is an apocalyptic number.

It is an amenable number.

166163837 is a deficient number, since it is larger than the sum of its proper divisors (23737699).

166163837 is an equidigital number, since it uses as much as digits as its factorization.

166163837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23737698.

The product of its digits is 108864, while the sum is 41.

The square root of 166163837 is about 12890.4552673674. The cubic root of 166163837 is about 549.7672149873.

The spelling of 166163837 in words is "one hundred sixty-six million, one hundred sixty-three thousand, eight hundred thirty-seven".