66163753 has 2 divisors, whose sum is σ = 66163754. Its totient is φ = 66163752.

The previous prime is 66163751. The next prime is 66163789. The reversal of 66163753 is 35736166.

66163753 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60171049 + 5992704 = 7757^2 + 2448^2 .

It is a cyclic number.

It is not a de Polignac number, because 66163753 - 2¹ = 66163751 is a prime.

It is a super-2 number, since 2×66163753² = 8755284422090018, which contains 22 as substring.

Together with 66163751, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66163751) 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, 33081876 + 33081877.

It is an arithmetic number, because the mean of its divisors is an integer number (33081877).

Almost surely, 2^66163753 is an apocalyptic number.

It is an amenable number.

66163753 is a deficient number, since it is larger than the sum of its proper divisors (1).

66163753 is an equidigital number, since it uses as much as digits as its factorization.

66163753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 37.

The square root of 66163753 is about 8134.1104615071. The cubic root of 66163753 is about 404.4579508638.

The spelling of 66163753 in words is "sixty-six million, one hundred sixty-three thousand, seven hundred fifty-three".