2061664330566 has 32 divisors (see below), whose sum is σ = 4256434556928. Its totient is φ = 665038120320.

The previous prime is 2061664330541. The next prime is 2061664330567. The reversal of 2061664330566 is 6650334661602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061664330567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10770691 + ... + 10960433.

It is an arithmetic number, because the mean of its divisors is an integer number (133013579904).

Almost surely, 2^{2061664330566} is an apocalyptic number.

2061664330566 is an abundant number, since it is smaller than the sum of its proper divisors (2194770226362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2061664330566 is a wasteful number, since it uses less digits than its factorization.

2061664330566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248196.

The product of its (nonzero) digits is 2799360, while the sum is 48.

The spelling of 2061664330566 in words is "two trillion, sixty-one billion, six hundred sixty-four million, three hundred thirty thousand, five hundred sixty-six".