3260661729 has 16 divisors (see below), whose sum is σ = 4683001344. Its totient is φ = 2006121600.

The previous prime is 3260661713. The next prime is 3260661737. The reversal of 3260661729 is 9271660623.

It is not a de Polignac number, because 3260661729 - 2⁴ = 3260661713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3260661709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333744 + ... + 343374.

It is an arithmetic number, because the mean of its divisors is an integer number (292687584).

Almost surely, 2^3260661729 is an apocalyptic number.

3260661729 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

3260661729 is a deficient number, since it is larger than the sum of its proper divisors (1422339615).

3260661729 is a wasteful number, since it uses less digits than its factorization.

3260661729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18328.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 3260661729 is about 57102.2042394162. The cubic root of 3260661729 is about 1482.8660267247.

The spelling of 3260661729 in words is "three billion, two hundred sixty million, six hundred sixty-one thousand, seven hundred twenty-nine".