166718349 has 24 divisors (see below), whose sum is σ = 278995392. Its totient is φ = 93960000.

The previous prime is 166718339. The next prime is 166718351. The reversal of 166718349 is 943817661.

It is a happy number.

It is not a de Polignac number, because 166718349 - 2⁴ = 166718333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166718309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13527 + ... + 22724.

It is an arithmetic number, because the mean of its divisors is an integer number (11624808).

Almost surely, 2^166718349 is an apocalyptic number.

It is an amenable number.

166718349 is a deficient number, since it is larger than the sum of its proper divisors (112277043).

166718349 is a wasteful number, since it uses less digits than its factorization.

166718349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36337 (or 36334 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 166718349 is about 12911.9459803703. The cubic root of 166718349 is about 550.3780860386.

The spelling of 166718349 in words is "one hundred sixty-six million, seven hundred eighteen thousand, three hundred forty-nine".