169500997966 has 4 divisors (see below), whose sum is σ = 254251496952. Its totient is φ = 84750498982.

The previous prime is 169500997951. The next prime is 169500998041. The reversal of 169500997966 is 669799005961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 669799005961 = 41 ⋅16336561121.

It is a super-3 number, since 3×169500997966³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42375249490 + ... + 42375249493.

It is an arithmetic number, because the mean of its divisors is an integer number (63562874238).

Almost surely, 2^169500997966 is an apocalyptic number.

169500997966 is a deficient number, since it is larger than the sum of its proper divisors (84750498986).

169500997966 is an equidigital number, since it uses as much as digits as its factorization.

169500997966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84750498985.

The product of its (nonzero) digits is 49601160, while the sum is 67.

The spelling of 169500997966 in words is "one hundred sixty-nine billion, five hundred million, nine hundred ninety-seven thousand, nine hundred sixty-six".