2660329729 has 8 divisors (see below), whose sum is σ = 2702108520. Its totient is φ = 2618695296.

The previous prime is 2660329723. The next prime is 2660329739. The reversal of 2660329729 is 9279230662.

It can be written as a sum of positive squares in 4 ways, for example, as 1580221504 + 1080108225 = 39752^2 + 32865^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2660329729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2660329723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1359 + ... + 72955.

It is an arithmetic number, because the mean of its divisors is an integer number (337763565).

Almost surely, 2^2660329729 is an apocalyptic number.

It is an amenable number.

2660329729 is a deficient number, since it is larger than the sum of its proper divisors (41778791).

2660329729 is an equidigital number, since it uses as much as digits as its factorization.

2660329729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72179.

The product of its (nonzero) digits is 489888, while the sum is 46.

The square root of 2660329729 is about 51578.3843194026. The cubic root of 2660329729 is about 1385.6232306581.

The spelling of 2660329729 in words is "two billion, six hundred sixty million, three hundred twenty-nine thousand, seven hundred twenty-nine".