2166361461 has 12 divisors (see below), whose sum is σ = 3413660640. Its totient is φ = 1312946280.

The previous prime is 2166361427. The next prime is 2166361487. The reversal of 2166361461 is 1641636612.

It is a happy number.

2166361461 is a `hidden beast` number, since 2 + 1 + 6 + 636 + 14 + 6 + 1 = 666.

It is not a de Polignac number, because 2166361461 - 2⁷ = 2166361333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166361661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10941121 + ... + 10941318.

It is an arithmetic number, because the mean of its divisors is an integer number (284471720).

Almost surely, 2^2166361461 is an apocalyptic number.

It is an amenable number.

2166361461 is a deficient number, since it is larger than the sum of its proper divisors (1247299179).

2166361461 is a wasteful number, since it uses less digits than its factorization.

2166361461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21882456 (or 21882453 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 2166361461 is about 46544.1882623384. The cubic root of 2166361461 is about 1293.9285843515.

The spelling of 2166361461 in words is "two billion, one hundred sixty-six million, three hundred sixty-one thousand, four hundred sixty-one".