166944749 has 2 divisors, whose sum is σ = 166944750. Its totient is φ = 166944748.

The previous prime is 166944737. The next prime is 166944779. The reversal of 166944749 is 947449661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94439524 + 72505225 = 9718^2 + 8515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166944749 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 166944697 and 166944706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166944719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83472374 + 83472375.

It is an arithmetic number, because the mean of its divisors is an integer number (83472375).

Almost surely, 2^166944749 is an apocalyptic number.

It is an amenable number.

166944749 is a deficient number, since it is larger than the sum of its proper divisors (1).

166944749 is an equidigital number, since it uses as much as digits as its factorization.

166944749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 50.

The square root of 166944749 is about 12920.7100811062. The cubic root of 166944749 is about 550.6271072931.

The spelling of 166944749 in words is "one hundred sixty-six million, nine hundred forty-four thousand, seven hundred forty-nine".