6616511065 has 8 divisors (see below), whose sum is σ = 7940761920. Its totient is φ = 5292576432.

The previous prime is 6616511053. The next prime is 6616511081. The reversal of 6616511065 is 5601156166.

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 6616511065 - 2¹¹ = 6616509017 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30285 + ... + 118954.

It is an arithmetic number, because the mean of its divisors is an integer number (992595240).

Almost surely, 2^6616511065 is an apocalyptic number.

It is an amenable number.

6616511065 is a deficient number, since it is larger than the sum of its proper divisors (1324250855).

6616511065 is a wasteful number, since it uses less digits than its factorization.

6616511065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158111.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 6616511065 is about 81341.9391519529. The cubic root of 6616511065 is about 1877.3403489417.

It can be divided in two parts, 66 and 16511065, that added together give a triangular number (16511131 = T₅₇₄₆).

The spelling of 6616511065 in words is "six billion, six hundred sixteen million, five hundred eleven thousand, sixty-five".