2066202640646 has 4 divisors (see below), whose sum is σ = 3099303960972. Its totient is φ = 1033101320322.

The previous prime is 2066202640633. The next prime is 2066202640669. The reversal of 2066202640646 is 6460462026602.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×2066202640646³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2066202640597 and 2066202640606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 516550660160 + ... + 516550660163.

It is an arithmetic number, because the mean of its divisors is an integer number (774825990243).

Almost surely, 2^{2066202640646} is an apocalyptic number.

2066202640646 is a deficient number, since it is larger than the sum of its proper divisors (1033101320326).

2066202640646 is a wasteful number, since it uses less digits than its factorization.

2066202640646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1033101320325.

The product of its (nonzero) digits is 995328, while the sum is 44.

The spelling of 2066202640646 in words is "two trillion, sixty-six billion, two hundred two million, six hundred forty thousand, six hundred forty-six".