166368739 has 2 divisors, whose sum is σ = 166368740. Its totient is φ = 166368738.

The previous prime is 166368703. The next prime is 166368743. The reversal of 166368739 is 937863661.

166368739 = T₁₀₅₃₀ + T₁₀₅₃₁ + T₁₀₅₃₂.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166368739 - 2¹⁵ = 166335971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166368692 and 166368701.

It is not a weakly prime, because it can be changed into another prime (166368779) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83184369 + 83184370.

It is an arithmetic number, because the mean of its divisors is an integer number (83184370).

Almost surely, 2^166368739 is an apocalyptic number.

166368739 is the 10532-nd centered triangular number.

166368739 is a deficient number, since it is larger than the sum of its proper divisors (1).

166368739 is an equidigital number, since it uses as much as digits as its factorization.

166368739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 49.

The square root of 166368739 is about 12898.4006372883. The cubic root of 166368739 is about 549.9931007399.

The spelling of 166368739 in words is "one hundred sixty-six million, three hundred sixty-eight thousand, seven hundred thirty-nine".