2166454061 has 2 divisors, whose sum is σ = 2166454062. Its totient is φ = 2166454060.

The previous prime is 2166454057. The next prime is 2166454091. The reversal of 2166454061 is 1604546612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1192389961 + 974064100 = 34531^2 + 31210^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166454061 - 2² = 2166454057 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166454001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083227030 + 1083227031.

It is an arithmetic number, because the mean of its divisors is an integer number (1083227031).

Almost surely, 2^2166454061 is an apocalyptic number.

It is an amenable number.

2166454061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166454061 is an equidigital number, since it uses as much as digits as its factorization.

2166454061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 2166454061 is about 46545.1830053336. The cubic root of 2166454061 is about 1293.9470201915.

The spelling of 2166454061 in words is "two billion, one hundred sixty-six million, four hundred fifty-four thousand, sixty-one".