6616410578 has 18 divisors (see below), whose sum is σ = 10032932559. Its totient is φ = 3272487232.

The previous prime is 6616410517. The next prime is 6616410583. The reversal of 6616410578 is 8750146166.

It can be written as a sum of positive squares in 5 ways, for example, as 1365524209 + 5250886369 = 36953^2 + 72463^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=57517.

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 8 ways as a sum of consecutive naturals, for example, 12998588 + ... + 12999096.

Almost surely, 2^6616410578 is an apocalyptic number.

6616410578 is a deficient number, since it is larger than the sum of its proper divisors (3416521981).

6616410578 is an frugal number, since it uses more digits than its factorization.

6616410578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 6616410578 is about 81341.3214670133. The cubic root of 6616410578 is about 1877.3308449774.

The spelling of 6616410578 in words is "six billion, six hundred sixteen million, four hundred ten thousand, five hundred seventy-eight".