16661166367354 has 4 divisors (see below), whose sum is σ = 24991749551034. Its totient is φ = 8330583183676.

The previous prime is 16661166367337. The next prime is 16661166367367. The reversal of 16661166367354 is 45376366116661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11268623193129 + 5392543174225 = 3356877^2 + 2322185^2 .

It is a super-2 number, since 2×16661166367354² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16661166367292 and 16661166367301.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4165291591837 + ... + 4165291591840.

Almost surely, 2^{16661166367354} is an apocalyptic number.

16661166367354 is a deficient number, since it is larger than the sum of its proper divisors (8330583183680).

16661166367354 is an equidigital number, since it uses as much as digits as its factorization.

16661166367354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8330583183679.

The product of its digits is 58786560, while the sum is 61.

The spelling of 16661166367354 in words is "sixteen trillion, six hundred sixty-one billion, one hundred sixty-six million, three hundred sixty-seven thousand, three hundred fifty-four".