6601006615565 has 8 divisors (see below), whose sum is σ = 7946515314168. Its totient is φ = 5263933708800.

The previous prime is 6601006615547. The next prime is 6601006615597. The reversal of 6601006615565 is 5655166001066.

It can be written as a sum of positive squares in 4 ways, for example, as 267217658761 + 6333788956804 = 516931^2 + 2516702^2 .

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

It is not a de Polignac number, because 6601006615565 - 2¹⁶ = 6601006550029 is a prime.

It is a Duffinian number.

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, 2108946236 + ... + 2108949365.

It is an arithmetic number, because the mean of its divisors is an integer number (993314414271).

Almost surely, 2^{6601006615565} is an apocalyptic number.

It is an amenable number.

6601006615565 is a deficient number, since it is larger than the sum of its proper divisors (1345508698603).

6601006615565 is a wasteful number, since it uses less digits than its factorization.

6601006615565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4217895919.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 6601006615565 in words is "six trillion, six hundred one billion, six million, six hundred fifteen thousand, five hundred sixty-five".