788661005 has 16 divisors (see below), whose sum is σ = 1033760448. Its totient is φ = 572832000.

The previous prime is 788661001. The next prime is 788661019. The reversal of 788661005 is 500166887.

It is not a de Polignac number, because 788661005 - 2² = 788661001 is a prime.

It is a super-2 number, since 2×788661005² = 1243972361615220050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (788661001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35765 + ... + 53445.

It is an arithmetic number, because the mean of its divisors is an integer number (64610028).

Almost surely, 2^788661005 is an apocalyptic number.

It is an amenable number.

788661005 is a deficient number, since it is larger than the sum of its proper divisors (245099443).

788661005 is a wasteful number, since it uses less digits than its factorization.

788661005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18508.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 788661005 is about 28083.1088912891. The cubic root of 788661005 is about 923.9109676807.

The spelling of 788661005 in words is "seven hundred eighty-eight million, six hundred sixty-one thousand, five".