16660326514331 has 2 divisors, whose sum is σ = 16660326514332. Its totient is φ = 16660326514330.

The previous prime is 16660326514319. The next prime is 16660326514357. The reversal of 16660326514331 is 13341562306661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16660326514331 - 2¹⁸ = 16660326252187 is a prime.

It is a super-2 number, since 2×16660326514331² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16660326514301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8330163257165 + 8330163257166.

It is an arithmetic number, because the mean of its divisors is an integer number (8330163257166).

Almost surely, 2^{16660326514331} is an apocalyptic number.

16660326514331 is a deficient number, since it is larger than the sum of its proper divisors (1).

16660326514331 is an equidigital number, since it uses as much as digits as its factorization.

16660326514331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 47.

The spelling of 16660326514331 in words is "sixteen trillion, six hundred sixty billion, three hundred twenty-six million, five hundred fourteen thousand, three hundred thirty-one".