2061166567 has 4 divisors (see below), whose sum is σ = 2063106640. Its totient is φ = 2059226496.

The previous prime is 2061166537. The next prime is 2061166571. The reversal of 2061166567 is 7656611602.

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

It is a cyclic number.

It is not a de Polignac number, because 2061166567 - 2¹¹ = 2061164519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061166517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 968442 + ... + 970567.

It is an arithmetic number, because the mean of its divisors is an integer number (515776660).

Almost surely, 2^2061166567 is an apocalyptic number.

2061166567 is a deficient number, since it is larger than the sum of its proper divisors (1940073).

2061166567 is a wasteful number, since it uses less digits than its factorization.

2061166567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940072.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 2061166567 is about 45400.0723237309. The cubic root of 2061166567 is about 1272.6364654873.

It can be divided in two parts, 20611 and 66567, that added together give a palindrome (87178).

The spelling of 2061166567 in words is "two billion, sixty-one million, one hundred sixty-six thousand, five hundred sixty-seven".