2166683563 has 16 divisors (see below), whose sum is σ = 2501130240. Its totient is φ = 1856239200.

The previous prime is 2166683521. The next prime is 2166683591. The reversal of 2166683563 is 3653866612.

2166683563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-2166683563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166684563) 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, 12781 + ... + 67057.

It is an arithmetic number, because the mean of its divisors is an integer number (156320640).

Almost surely, 2^2166683563 is an apocalyptic number.

2166683563 is a deficient number, since it is larger than the sum of its proper divisors (334446677).

2166683563 is a wasteful number, since it uses less digits than its factorization.

2166683563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54498.

The product of its digits is 933120, while the sum is 46.

The square root of 2166683563 is about 46547.6483079435. The cubic root of 2166683563 is about 1293.9927097430.

The spelling of 2166683563 in words is "two billion, one hundred sixty-six million, six hundred eighty-three thousand, five hundred sixty-three".