670605161 has 2 divisors, whose sum is σ = 670605162. Its totient is φ = 670605160.

The previous prime is 670605157. The next prime is 670605191. The reversal of 670605161 is 161506076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400200025 + 270405136 = 20005^2 + 16444^2 .

It is a cyclic number.

It is not a de Polignac number, because 670605161 - 2² = 670605157 is a prime.

It is a super-2 number, since 2×670605161² = 899422563919671842, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (670605191) 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, 335302580 + 335302581.

It is an arithmetic number, because the mean of its divisors is an integer number (335302581).

Almost surely, 2^670605161 is an apocalyptic number.

It is an amenable number.

670605161 is a deficient number, since it is larger than the sum of its proper divisors (1).

670605161 is an equidigital number, since it uses as much as digits as its factorization.

670605161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 670605161 is about 25896.0452772233. The cubic root of 670605161 is about 875.2973839787.

The spelling of 670605161 in words is "six hundred seventy million, six hundred five thousand, one hundred sixty-one".