166501667 has 2 divisors, whose sum is σ = 166501668. Its totient is φ = 166501666.

The previous prime is 166501649. The next prime is 166501681. The reversal of 166501667 is 766105661.

It is a strong prime.

It is an emirp because it is prime and its reverse (766105661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166501667 - 2⁸ = 166501411 is a prime.

It is a super-2 number, since 2×166501667² = 55445610227557778, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166501667.

It is not a weakly prime, because it can be changed into another prime (166501607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83250833 + 83250834.

It is an arithmetic number, because the mean of its divisors is an integer number (83250834).

Almost surely, 2^166501667 is an apocalyptic number.

166501667 is a deficient number, since it is larger than the sum of its proper divisors (1).

166501667 is an equidigital number, since it uses as much as digits as its factorization.

166501667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 166501667 is about 12903.5524953402. The cubic root of 166501667 is about 550.1395425546.

The spelling of 166501667 in words is "one hundred sixty-six million, five hundred one thousand, six hundred sixty-seven".