6664109956 has 81 divisors (see below), whose sum is σ = 14453316549. Its totient is φ = 2688044352.

The previous prime is 6664109941. The next prime is 6664109971. The reversal of 6664109956 is 6599014666.

The square root of 6664109956 is 81634.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (6664109941) and next prime (6664109971).

It can be written as a sum of positive squares in only one way, i.e., 5188320900 + 1475789056 = 72030^2 + 38416^2 .

6664109956 is a modest number, since divided by 109956 gives 6664 as remainder.

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 26 ways as a sum of consecutive naturals, for example, 392006460 + ... + 392006476.

Almost surely, 2^6664109956 is an apocalyptic number.

6664109956 is the 81634-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6664109956

6664109956 is an abundant number, since it is smaller than the sum of its proper divisors (7789206593).

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

6664109956 is an frugal number, since it uses more digits than its factorization.

6664109956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 26 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 52.

The cubic root of 6664109956 is about 1881.8314313135.

The spelling of 6664109956 in words is "six billion, six hundred sixty-four million, one hundred nine thousand, nine hundred fifty-six".