166388023 has 2 divisors, whose sum is σ = 166388024. Its totient is φ = 166388022.

The previous prime is 166388017. The next prime is 166388029. The reversal of 166388023 is 320883661.

It is a balanced prime because it is at equal distance from previous prime (166388017) and next prime (166388029).

It is a cyclic number.

It is not a de Polignac number, because 166388023 - 2¹³ = 166379831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166388029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83194011 + 83194012.

It is an arithmetic number, because the mean of its divisors is an integer number (83194012).

Almost surely, 2^166388023 is an apocalyptic number.

166388023 is a deficient number, since it is larger than the sum of its proper divisors (1).

166388023 is an equidigital number, since it uses as much as digits as its factorization.

166388023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 166388023 is about 12899.1481501687. The cubic root of 166388023 is about 550.0143500388.

The spelling of 166388023 in words is "one hundred sixty-six million, three hundred eighty-eight thousand, twenty-three".