161166747 has 16 divisors (see below), whose sum is σ = 247358720. Its totient is φ = 91431072.

The previous prime is 161166743. The next prime is 161166751. The reversal of 161166747 is 747661161.

It is an interprime number because it is at equal distance from previous prime (161166743) and next prime (161166751).

It is not a de Polignac number, because 161166747 - 2² = 161166743 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (161166743) 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, 24688 + ... + 30525.

It is an arithmetic number, because the mean of its divisors is an integer number (15459920).

Almost surely, 2^161166747 is an apocalyptic number.

161166747 is a deficient number, since it is larger than the sum of its proper divisors (86191973).

161166747 is a wasteful number, since it uses less digits than its factorization.

161166747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55362.

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

The square root of 161166747 is about 12695.1465923005. The cubic root of 161166747 is about 544.1999280914.

The spelling of 161166747 in words is "one hundred sixty-one million, one hundred sixty-six thousand, seven hundred forty-seven".