166668335197 has 16 divisors (see below), whose sum is σ = 205887227392. Its totient is φ = 131382829440.

The previous prime is 166668335143. The next prime is 166668335201. The reversal of 166668335197 is 791533866661.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166668335197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166668335107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3354528 + ... + 3403849.

It is an arithmetic number, because the mean of its divisors is an integer number (12867951712).

Almost surely, 2^166668335197 is an apocalyptic number.

It is an amenable number.

166668335197 is a deficient number, since it is larger than the sum of its proper divisors (39218892195).

166668335197 is a wasteful number, since it uses less digits than its factorization.

166668335197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6758668.

The product of its digits is 29393280, while the sum is 61.

The spelling of 166668335197 in words is "one hundred sixty-six billion, six hundred sixty-eight million, three hundred thirty-five thousand, one hundred ninety-seven".