166668844 has 6 divisors (see below), whose sum is σ = 291670484. Its totient is φ = 83334420.

The previous prime is 166668841. The next prime is 166668847. The reversal of 166668844 is 448866661.

It is an interprime number because it is at equal distance from previous prime (166668841) and next prime (166668847).

It is a super-3 number, since 3×166668844³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (166668841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20833602 + ... + 20833609.

Almost surely, 2^166668844 is an apocalyptic number.

It is an amenable number.

166668844 is a deficient number, since it is larger than the sum of its proper divisors (125001640).

166668844 is a wasteful number, since it uses less digits than its factorization.

166668844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41667215 (or 41667213 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 49.

The square root of 166668844 is about 12910.0288148400. The cubic root of 166668844 is about 550.3236046041.

The spelling of 166668844 in words is "one hundred sixty-six million, six hundred sixty-eight thousand, eight hundred forty-four".