6656060071661 has 16 divisors (see below), whose sum is σ = 8936807929728. Its totient is φ = 4787575675200.

The previous prime is 6656060071621. The next prime is 6656060071673. The reversal of 6656060071661 is 1661700606566.

It is a cyclic number.

It is not a de Polignac number, because 6656060071661 - 2³⁸ = 6381182164717 is a prime.

It is a super-3 number, since 3×6656060071661³ (a number of 39 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6656060071621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3324704330 + ... + 3324706331.

It is an arithmetic number, because the mean of its divisors is an integer number (558550495608).

Almost surely, 2^{6656060071661} is an apocalyptic number.

It is an amenable number.

6656060071661 is a deficient number, since it is larger than the sum of its proper divisors (2280747858067).

6656060071661 is a wasteful number, since it uses less digits than its factorization.

6656060071661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6649410692.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 6656060071661 in words is "six trillion, six hundred fifty-six billion, sixty million, seventy-one thousand, six hundred sixty-one".