6630434785 has 16 divisors (see below), whose sum is σ = 8570446416. Its totient is φ = 4895244288.

The previous prime is 6630434777. The next prime is 6630434803. The reversal of 6630434785 is 5874340366.

It can be written as a sum of positive squares in 8 ways, for example, as 595164816 + 6035269969 = 24396^2 + 77687^2 .

It is a cyclic number.

It is not a de Polignac number, because 6630434785 - 2³ = 6630434777 is a prime.

It is a Duffinian number.

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 15 ways as a sum of consecutive naturals, for example, 403857 + ... + 419953.

It is an arithmetic number, because the mean of its divisors is an integer number (535652901).

Almost surely, 2^6630434785 is an apocalyptic number.

6630434785 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6630434785 is a deficient number, since it is larger than the sum of its proper divisors (1940011631).

6630434785 is a wasteful number, since it uses less digits than its factorization.

6630434785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22452.

The product of its (nonzero) digits is 1451520, while the sum is 46.

The square root of 6630434785 is about 81427.4817552403. The cubic root of 6630434785 is about 1878.6563117187.

The spelling of 6630434785 in words is "six billion, six hundred thirty million, four hundred thirty-four thousand, seven hundred eighty-five".