166841387 has 2 divisors, whose sum is σ = 166841388. Its totient is φ = 166841386.

The previous prime is 166841377. The next prime is 166841407. The reversal of 166841387 is 783148661.

It is a weak prime.

It is an emirp because it is prime and its reverse (783148661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166841387 - 2⁸ = 166841131 is a prime.

It is not a weakly prime, because it can be changed into another prime (166841317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83420693 + 83420694.

It is an arithmetic number, because the mean of its divisors is an integer number (83420694).

Almost surely, 2^166841387 is an apocalyptic number.

166841387 is a deficient number, since it is larger than the sum of its proper divisors (1).

166841387 is an equidigital number, since it uses as much as digits as its factorization.

166841387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 44.

The square root of 166841387 is about 12916.7096042297. The cubic root of 166841387 is about 550.5134455990.

The spelling of 166841387 in words is "one hundred sixty-six million, eight hundred forty-one thousand, three hundred eighty-seven".