166418797 has 8 divisors (see below), whose sum is σ = 179097912. Its totient is φ = 154060800.

The previous prime is 166418783. The next prime is 166418801. The reversal of 166418797 is 797814661.

It can be written as a sum of positive squares in 4 ways, for example, as 34596 + 166384201 = 186^2 + 12899^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166418797 - 2⁷ = 166418669 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166418797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166418717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79204 + ... + 81277.

It is an arithmetic number, because the mean of its divisors is an integer number (22387239).

Almost surely, 2^166418797 is an apocalyptic number.

166418797 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

166418797 is a deficient number, since it is larger than the sum of its proper divisors (12679115).

166418797 is a wasteful number, since it uses less digits than its factorization.

166418797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160559.

The product of its digits is 508032, while the sum is 49.

The square root of 166418797 is about 12900.3409644862. The cubic root of 166418797 is about 550.0482569228.

The spelling of 166418797 in words is "one hundred sixty-six million, four hundred eighteen thousand, seven hundred ninety-seven".