2166342877 has 2 divisors, whose sum is σ = 2166342878. Its totient is φ = 2166342876.

The previous prime is 2166342869. The next prime is 2166342887. The reversal of 2166342877 is 7782436612.

2166342877 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1394947801 + 771395076 = 37349^2 + 27774^2 .

It is a cyclic number.

It is not a de Polignac number, because 2166342877 - 2³ = 2166342869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2166342887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083171438 + 1083171439.

It is an arithmetic number, because the mean of its divisors is an integer number (1083171439).

Almost surely, 2^2166342877 is an apocalyptic number.

It is an amenable number.

2166342877 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166342877 is an equidigital number, since it uses as much as digits as its factorization.

2166342877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 46.

The square root of 2166342877 is about 46543.9886236665. The cubic root of 2166342877 is about 1293.9248843783.

The spelling of 2166342877 in words is "two billion, one hundred sixty-six million, three hundred forty-two thousand, eight hundred seventy-seven".