1664259196 has 6 divisors (see below), whose sum is σ = 2912453600. Its totient is φ = 832129596.

The previous prime is 1664259169. The next prime is 1664259227. The reversal of 1664259196 is 6919524661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208032396 + ... + 208032403.

Almost surely, 2^1664259196 is an apocalyptic number.

It is an amenable number.

1664259196 is a deficient number, since it is larger than the sum of its proper divisors (1248194404).

1664259196 is a wasteful number, since it uses less digits than its factorization.

1664259196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416064803 (or 416064801 counting only the distinct ones).

The product of its digits is 699840, while the sum is 49.

The square root of 1664259196 is about 40795.3330173931. Note that the first 3 decimals coincide. The cubic root of 1664259196 is about 1185.0599519835.

The spelling of 1664259196 in words is "one billion, six hundred sixty-four million, two hundred fifty-nine thousand, one hundred ninety-six".