166746739 has 2 divisors, whose sum is σ = 166746740. Its totient is φ = 166746738.

The previous prime is 166746721. The next prime is 166746779. The reversal of 166746739 is 937647661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 166746739 - 2¹⁹ = 166222451 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166746692 and 166746701.

It is not a weakly prime, because it can be changed into another prime (166746779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83373369 + 83373370.

It is an arithmetic number, because the mean of its divisors is an integer number (83373370).

Almost surely, 2^166746739 is an apocalyptic number.

166746739 is a deficient number, since it is larger than the sum of its proper divisors (1).

166746739 is an equidigital number, since it uses as much as digits as its factorization.

166746739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 49.

The square root of 166746739 is about 12913.0453031034. The cubic root of 166746739 is about 550.4093250456.

The spelling of 166746739 in words is "one hundred sixty-six million, seven hundred forty-six thousand, seven hundred thirty-nine".