166863162465 has 36 divisors (see below), whose sum is σ = 307243798524. Its totient is φ = 83758757376.

The previous prime is 166863162383. The next prime is 166863162503. The reversal of 166863162465 is 564261368661.

166863162465 is a `hidden beast` number, since 1 + 6 + 6 + 8 + 6 + 3 + 1 + 624 + 6 + 5 = 666.

166863162465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 19860701184 + 147002461281 = 140928^2 + 383409^2 .

It is not a de Polignac number, because 166863162465 - 2¹⁰ = 166863161441 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6402342 + ... + 6428351.

It is an arithmetic number, because the mean of its divisors is an integer number (8534549959).

Almost surely, 2^166863162465 is an apocalyptic number.

166863162465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166863162465 is a deficient number, since it is larger than the sum of its proper divisors (140380636059).

166863162465 is a wasteful number, since it uses less digits than its factorization.

166863162465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12830738 (or 12830718 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 54.

The spelling of 166863162465 in words is "one hundred sixty-six billion, eight hundred sixty-three million, one hundred sixty-two thousand, four hundred sixty-five".