167740081 has 6 divisors (see below), whose sum is σ = 175350770. Its totient is φ = 160446528.

The previous prime is 167740073. The next prime is 167740087. The reversal of 167740081 is 180047761.

It can be written as a sum of positive squares in only one way, i.e., 99181681 + 68558400 = 9959^2 + 8280^2 .

It is not a de Polignac number, because 167740081 - 2³ = 167740073 is a prime.

It is a super-2 number, since 2×167740081² = 56273469547773122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (167740087) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 158016 + ... + 159073.

Almost surely, 2^167740081 is an apocalyptic number.

It is an amenable number.

167740081 is a deficient number, since it is larger than the sum of its proper divisors (7610689).

167740081 is an equidigital number, since it uses as much as digits as its factorization.

167740081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317135 (or 317112 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 167740081 is about 12951.4509225801. The cubic root of 167740081 is about 551.5001261703.

The spelling of 167740081 in words is "one hundred sixty-seven million, seven hundred forty thousand, eighty-one".