166503712623 has 16 divisors (see below), whose sum is σ = 225427836672. Its totient is φ = 109295144000.

The previous prime is 166503712517. The next prime is 166503712637. The reversal of 166503712623 is 326217305661.

166503712623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 166503712623 - 2²⁵ = 166470158191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166503712693) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 351513 + ... + 675698.

It is an arithmetic number, because the mean of its divisors is an integer number (14089239792).

Almost surely, 2^166503712623 is an apocalyptic number.

166503712623 is a deficient number, since it is larger than the sum of its proper divisors (58924124049).

166503712623 is a wasteful number, since it uses less digits than its factorization.

166503712623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028046.

The product of its (nonzero) digits is 272160, while the sum is 42.

It can be divided in two parts, 16650 and 3712623, that added together give a palindrome (3729273).

The spelling of 166503712623 in words is "one hundred sixty-six billion, five hundred three million, seven hundred twelve thousand, six hundred twenty-three".