166344869 has 2 divisors, whose sum is σ = 166344870. Its totient is φ = 166344868.

The previous prime is 166344839. The next prime is 166344877. The reversal of 166344869 is 968443661.

166344869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136773025 + 29571844 = 11695^2 + 5438^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166344869 is a prime.

It is a super-2 number, since 2×166344869² = 55341230885254322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166344839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83172434 + 83172435.

It is an arithmetic number, because the mean of its divisors is an integer number (83172435).

Almost surely, 2^166344869 is an apocalyptic number.

It is an amenable number.

166344869 is a deficient number, since it is larger than the sum of its proper divisors (1).

166344869 is an equidigital number, since it uses as much as digits as its factorization.

166344869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 47.

The square root of 166344869 is about 12897.4752955763. The cubic root of 166344869 is about 549.9667957916.

The spelling of 166344869 in words is "one hundred sixty-six million, three hundred forty-four thousand, eight hundred sixty-nine".