2066617626578 has 32 divisors (see below), whose sum is σ = 3264028859520. Its totient is φ = 979447835520.

The previous prime is 2066617626527. The next prime is 2066617626587. The reversal of 2066617626578 is 8756267166602.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2066617626578.

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 15 ways as a sum of consecutive naturals, for example, 3311288 + ... + 3885596.

It is an arithmetic number, because the mean of its divisors is an integer number (102000901860).

Almost surely, 2^{2066617626578} is an apocalyptic number.

2066617626578 is a deficient number, since it is larger than the sum of its proper divisors (1197411232942).

2066617626578 is a wasteful number, since it uses less digits than its factorization.

2066617626578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575042.

The product of its (nonzero) digits is 60963840, while the sum is 62.

The spelling of 2066617626578 in words is "two trillion, sixty-six billion, six hundred seventeen million, six hundred twenty-six thousand, five hundred seventy-eight".