6664766329 has 8 divisors (see below), whose sum is σ = 7240959432. Its totient is φ = 6097647360.

The previous prime is 6664766293. The next prime is 6664766347. The reversal of 6664766329 is 9236674666.

It can be written as a sum of positive squares in 4 ways, for example, as 251159104 + 6413607225 = 15848^2 + 80085^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6664766329 - 2¹³ = 6664758137 is a prime.

It is a super-2 number, since 2×6664766329² = 88838220440344272482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6664766329.

It is not an unprimeable number, because it can be changed into a prime (6664766359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2267002 + ... + 2269939.

It is an arithmetic number, because the mean of its divisors is an integer number (905119929).

Almost surely, 2^6664766329 is an apocalyptic number.

It is an amenable number.

6664766329 is a deficient number, since it is larger than the sum of its proper divisors (576193103).

6664766329 is a wasteful number, since it uses less digits than its factorization.

6664766329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4537067.

The product of its digits is 11757312, while the sum is 55.

The square root of 6664766329 is about 81638.0201193047. The cubic root of 6664766329 is about 1881.8932121465.

The spelling of 6664766329 in words is "six billion, six hundred sixty-four million, seven hundred sixty-six thousand, three hundred twenty-nine".