1666667196 has 18 divisors (see below), whose sum is σ = 4212964392. Its totient is φ = 555555720.

The previous prime is 1666667153. The next prime is 1666667221. The reversal of 1666667196 is 6917666661.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×1666667196³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23148120 + ... + 23148191.

Almost surely, 2^1666667196 is an apocalyptic number.

It is an amenable number.

1666667196 is an abundant number, since it is smaller than the sum of its proper divisors (2546297196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666667196 is a wasteful number, since it uses less digits than its factorization.

1666667196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46296321 (or 46296316 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 1666667196 is about 40824.8355293686. The cubic root of 1666667196 is about 1185.6312270155.

The spelling of 1666667196 in words is "one billion, six hundred sixty-six million, six hundred sixty-seven thousand, one hundred ninety-six".