16661172537467 has 2 divisors, whose sum is σ = 16661172537468. Its totient is φ = 16661172537466.

The previous prime is 16661172537439. The next prime is 16661172537491. The reversal of 16661172537467 is 76473527116661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16661172537467 - 2¹⁰ = 16661172536443 is a prime.

It is not a weakly prime, because it can be changed into another prime (16661172537967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8330586268733 + 8330586268734.

It is an arithmetic number, because the mean of its divisors is an integer number (8330586268734).

Almost surely, 2^{16661172537467} is an apocalyptic number.

16661172537467 is a deficient number, since it is larger than the sum of its proper divisors (1).

16661172537467 is an equidigital number, since it uses as much as digits as its factorization.

16661172537467 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53343360, while the sum is 62.

The spelling of 16661172537467 in words is "sixteen trillion, six hundred sixty-one billion, one hundred seventy-two million, five hundred thirty-seven thousand, four hundred sixty-seven".