6616507885 has 8 divisors (see below), whose sum is σ = 8550564120. Its totient is φ = 4886036544.

The previous prime is 6616507853. The next prime is 6616507903. The reversal of 6616507885 is 5887056166.

It can be written as a sum of positive squares in 4 ways, for example, as 671172649 + 5945335236 = 25907^2 + 77106^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6616507885 - 2⁵ = 6616507853 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50896150 + ... + 50896279.

It is an arithmetic number, because the mean of its divisors is an integer number (1068820515).

Almost surely, 2^6616507885 is an apocalyptic number.

6616507885 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6616507885 is a deficient number, since it is larger than the sum of its proper divisors (1934056235).

6616507885 is a wasteful number, since it uses less digits than its factorization.

6616507885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101792447.

The product of its (nonzero) digits is 2419200, while the sum is 52.

The square root of 6616507885 is about 81341.9196048384. The cubic root of 6616507885 is about 1877.3400481818.

The spelling of 6616507885 in words is "six billion, six hundred sixteen million, five hundred seven thousand, eight hundred eighty-five".