161086966 has 4 divisors (see below), whose sum is σ = 241630452. Its totient is φ = 80543482.

The previous prime is 161086957. The next prime is 161086969. The reversal of 161086966 is 669680161.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161086969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40271740 + ... + 40271743.

It is an arithmetic number, because the mean of its divisors is an integer number (60407613).

Almost surely, 2^161086966 is an apocalyptic number.

161086966 is a deficient number, since it is larger than the sum of its proper divisors (80543486).

161086966 is an equidigital number, since it uses as much as digits as its factorization.

161086966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80543485.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 161086966 is about 12692.0040182786. The cubic root of 161086966 is about 544.1101163874.

The spelling of 161086966 in words is "one hundred sixty-one million, eighty-six thousand, nine hundred sixty-six".