2166851707 has 2 divisors, whose sum is σ = 2166851708. Its totient is φ = 2166851706.

The previous prime is 2166851651. The next prime is 2166851717. The reversal of 2166851707 is 7071586612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2166851707 - 2¹⁵ = 2166818939 is a prime.

It is not a weakly prime, because it can be changed into another prime (2166851717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083425853 + 1083425854.

It is an arithmetic number, because the mean of its divisors is an integer number (1083425854).

Almost surely, 2^2166851707 is an apocalyptic number.

2166851707 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166851707 is an equidigital number, since it uses as much as digits as its factorization.

2166851707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 2166851707 is about 46549.4544221519. The cubic root of 2166851707 is about 1294.0261820177.

The spelling of 2166851707 in words is "two billion, one hundred sixty-six million, eight hundred fifty-one thousand, seven hundred seven".