6628729585 has 16 divisors (see below), whose sum is σ = 8013582720. Its totient is φ = 5263726720.

The previous prime is 6628729579. The next prime is 6628729609. The reversal of 6628729585 is 5859278266.

6628729585 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6628729585 - 2³ = 6628729577 is a prime.

It is a super-2 number, since 2×6628729585² = 87880111822108544450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360546 + ... + 378484.

It is an arithmetic number, because the mean of its divisors is an integer number (500848920).

Almost surely, 2^6628729585 is an apocalyptic number.

It is an amenable number.

6628729585 is a deficient number, since it is larger than the sum of its proper divisors (1384853135).

6628729585 is a wasteful number, since it uses less digits than its factorization.

6628729585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18488.

The product of its digits is 14515200, while the sum is 58.

The square root of 6628729585 is about 81417.0104155145. The cubic root of 6628729585 is about 1878.4952484045.

The spelling of 6628729585 in words is "six billion, six hundred twenty-eight million, seven hundred twenty-nine thousand, five hundred eighty-five".