6616526609 has 16 divisors (see below), whose sum is σ = 8251313280. Its totient is φ = 5154399360.

The previous prime is 6616526593. The next prime is 6616526641. The reversal of 6616526609 is 9066256166.

It is a happy number.

It is not a de Polignac number, because 6616526609 - 2⁴ = 6616526593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6616526689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373967 + ... + 391259.

It is an arithmetic number, because the mean of its divisors is an integer number (515707080).

Almost surely, 2^6616526609 is an apocalyptic number.

It is an amenable number.

6616526609 is a deficient number, since it is larger than the sum of its proper divisors (1634786671).

6616526609 is a wasteful number, since it uses less digits than its factorization.

6616526609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22280.

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 6616526609 is about 81342.0346991640. The cubic root of 6616526609 is about 1877.3418190698.

The spelling of 6616526609 in words is "six billion, six hundred sixteen million, five hundred twenty-six thousand, six hundred nine".