161766147 has 16 divisors (see below), whose sum is σ = 223453440. Its totient is φ = 103972512.

The previous prime is 161766139. The next prime is 161766161. The reversal of 161766147 is 741667161.

It is not a de Polignac number, because 161766147 - 2³ = 161766139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161766947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112648 + ... + 114074.

It is an arithmetic number, because the mean of its divisors is an integer number (13965840).

Almost surely, 2^161766147 is an apocalyptic number.

161766147 is a deficient number, since it is larger than the sum of its proper divisors (61687293).

161766147 is a wasteful number, since it uses less digits than its factorization.

161766147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2762.

The product of its digits is 42336, while the sum is 39.

The square root of 161766147 is about 12718.7321302086. The cubic root of 161766147 is about 544.8737434435.

The spelling of 161766147 in words is "one hundred sixty-one million, seven hundred sixty-six thousand, one hundred forty-seven".