166704331 has 2 divisors, whose sum is σ = 166704332. Its totient is φ = 166704330.

The previous prime is 166704313. The next prime is 166704337. The reversal of 166704331 is 133407661.

Together with previous prime (166704313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 166704331 - 2¹⁵ = 166671563 is a prime.

It is a super-2 number, since 2×166704331² = 55580667948315122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166704293 and 166704302.

It is not a weakly prime, because it can be changed into another prime (166704337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83352165 + 83352166.

It is an arithmetic number, because the mean of its divisors is an integer number (83352166).

Almost surely, 2^166704331 is an apocalyptic number.

166704331 is a deficient number, since it is larger than the sum of its proper divisors (1).

166704331 is an equidigital number, since it uses as much as digits as its factorization.

166704331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 166704331 is about 12911.4031383115. The cubic root of 166704331 is about 550.3626599896.

The spelling of 166704331 in words is "one hundred sixty-six million, seven hundred four thousand, three hundred thirty-one".