326166661623 has 32 divisors (see below), whose sum is σ = 508431186432. Its totient is φ = 183971779200.

The previous prime is 326166661567. The next prime is 326166661637.

326166661623 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 326166661623 - 2⁸ = 326166661367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326166661663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5779108 + ... + 5835273.

It is an arithmetic number, because the mean of its divisors is an integer number (15888474576).

Almost surely, 2^326166661623 is an apocalyptic number.

326166661623 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

326166661623 is a deficient number, since it is larger than the sum of its proper divisors (182264524809).

326166661623 is a wasteful number, since it uses less digits than its factorization.

326166661623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11614455.

The product of its digits is 1679616, while the sum is 48.

It can be divided in two parts, 326166 and 661623, that added together give a palindrome (987789).

The spelling of 326166661623 in words is "three hundred twenty-six billion, one hundred sixty-six million, six hundred sixty-one thousand, six hundred twenty-three".