16746166109 has 2 divisors, whose sum is σ = 16746166110. Its totient is φ = 16746166108.

The previous prime is 16746166079. The next prime is 16746166123. The reversal of 16746166109 is 90166164761.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14640274009 + 2105892100 = 120997^2 + 45890^2 .

It is a cyclic number.

It is not a de Polignac number, because 16746166109 - 2⁸ = 16746165853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16746166159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8373083054 + 8373083055.

It is an arithmetic number, because the mean of its divisors is an integer number (8373083055).

Almost surely, 2^16746166109 is an apocalyptic number.

It is an amenable number.

16746166109 is a deficient number, since it is larger than the sum of its proper divisors (1).

16746166109 is an equidigital number, since it uses as much as digits as its factorization.

16746166109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 16746166109 in words is "sixteen billion, seven hundred forty-six million, one hundred sixty-six thousand, one hundred nine".