545664006661 has 8 divisors (see below), whose sum is σ = 563483547648. Its totient is φ = 527858058000.

The previous prime is 545664006637. The next prime is 545664006673. The reversal of 545664006661 is 166600466545.

It is a happy number.

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 545664006661 - 2⁷ = 545664006533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545664006361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3316450 + ... + 3477091.

It is an arithmetic number, because the mean of its divisors is an integer number (70435443456).

Almost surely, 2^545664006661 is an apocalyptic number.

It is an amenable number.

545664006661 is a deficient number, since it is larger than the sum of its proper divisors (17819540987).

545664006661 is a wasteful number, since it uses less digits than its factorization.

545664006661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6796163.

The product of its (nonzero) digits is 3110400, while the sum is 49.

The spelling of 545664006661 in words is "five hundred forty-five billion, six hundred sixty-four million, six thousand, six hundred sixty-one".