161166047 has 12 divisors (see below), whose sum is σ = 187723800. Its totient is φ = 137961936.

The previous prime is 161166029. The next prime is 161166053. The reversal of 161166047 is 740661161.

It is a happy number.

It is not a de Polignac number, because 161166047 - 2¹⁰ = 161165023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161166067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47204 + ... + 50502.

It is an arithmetic number, because the mean of its divisors is an integer number (15643650).

Almost surely, 2^161166047 is an apocalyptic number.

161166047 is a deficient number, since it is larger than the sum of its proper divisors (26557753).

161166047 is an equidigital number, since it uses as much as digits as its factorization.

161166047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4310 (or 4303 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 161166047 is about 12695.1190226795. The cubic root of 161166047 is about 544.1991402107.

The spelling of 161166047 in words is "one hundred sixty-one million, one hundred sixty-six thousand, forty-seven".