670161761 has 2 divisors, whose sum is σ = 670161762. Its totient is φ = 670161760.

The previous prime is 670161721. The next prime is 670161773. The reversal of 670161761 is 167161076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 565488400 + 104673361 = 23780^2 + 10231^2 .

It is a cyclic number.

It is not a de Polignac number, because 670161761 - 2¹⁸ = 669899617 is a prime.

It is a super-2 number, since 2×670161761² = 898233571813242242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (670161721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335080880 + 335080881.

It is an arithmetic number, because the mean of its divisors is an integer number (335080881).

Almost surely, 2^670161761 is an apocalyptic number.

It is an amenable number.

670161761 is a deficient number, since it is larger than the sum of its proper divisors (1).

670161761 is an equidigital number, since it uses as much as digits as its factorization.

670161761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 35.

The square root of 670161761 is about 25887.4827088305. The cubic root of 670161761 is about 875.1044276997.

The spelling of 670161761 in words is "six hundred seventy million, one hundred sixty-one thousand, seven hundred sixty-one".