858166601 has 2 divisors, whose sum is σ = 858166602. Its totient is φ = 858166600.

The previous prime is 858166591. The next prime is 858166607. The reversal of 858166601 is 106661858.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 800041225 + 58125376 = 28285^2 + 7624^2 .

It is a cyclic number.

It is not a de Polignac number, because 858166601 - 2¹⁸ = 857904457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (858166607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429083300 + 429083301.

It is an arithmetic number, because the mean of its divisors is an integer number (429083301).

Almost surely, 2^858166601 is an apocalyptic number.

It is an amenable number.

858166601 is a deficient number, since it is larger than the sum of its proper divisors (1).

858166601 is an equidigital number, since it uses as much as digits as its factorization.

858166601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 858166601 is about 29294.4807258978. The cubic root of 858166601 is about 950.2922834721.

The spelling of 858166601 in words is "eight hundred fifty-eight million, one hundred sixty-six thousand, six hundred one".