10211610661566 has 32 divisors (see below), whose sum is σ = 22432828919040. Its totient is φ = 3084513974784.

The previous prime is 10211610661541. The next prime is 10211610661597. The reversal of 10211610661566 is 66516601611201.

10211610661566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1947291555 + ... + 1947296798.

It is an arithmetic number, because the mean of its divisors is an integer number (701025903720).

Almost surely, 2^{10211610661566} is an apocalyptic number.

10211610661566 is an abundant number, since it is smaller than the sum of its proper divisors (12221218257474).

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

10211610661566 is a wasteful number, since it uses less digits than its factorization.

10211610661566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3894588400.

The product of its (nonzero) digits is 77760, while the sum is 42.

The spelling of 10211610661566 in words is "ten trillion, two hundred eleven billion, six hundred ten million, six hundred sixty-one thousand, five hundred sixty-six".