162661663 has 2 divisors, whose sum is σ = 162661664. Its totient is φ = 162661662.

The previous prime is 162661621. The next prime is 162661669. The reversal of 162661663 is 366166261.

It is a strong prime.

It is an emirp because it is prime and its reverse (366166261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 162661663 - 2²¹ = 160564511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162661669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81330831 + 81330832.

It is an arithmetic number, because the mean of its divisors is an integer number (81330832).

Almost surely, 2^162661663 is an apocalyptic number.

162661663 is a deficient number, since it is larger than the sum of its proper divisors (1).

162661663 is an equidigital number, since it uses as much as digits as its factorization.

162661663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 37.

The square root of 162661663 is about 12753.8881522460. Note that the first 3 decimals coincide. The cubic root of 162661663 is about 545.8773434488.

It can be divided in two parts, 162 and 661663, that added together give a triangular number (661825 = T₁₁₅₀).

The spelling of 162661663 in words is "one hundred sixty-two million, six hundred sixty-one thousand, six hundred sixty-three".