670776181 has 2 divisors, whose sum is σ = 670776182. Its totient is φ = 670776180.

The previous prime is 670776173. The next prime is 670776229. The reversal of 670776181 is 181677076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 654848100 + 15928081 = 25590^2 + 3991^2 .

It is a cyclic number.

It is not a de Polignac number, because 670776181 - 2³ = 670776173 is a prime.

It is a super-2 number, since 2×670776181² = 899881369993889522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670776581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335388090 + 335388091.

It is an arithmetic number, because the mean of its divisors is an integer number (335388091).

Almost surely, 2^670776181 is an apocalyptic number.

It is an amenable number.

670776181 is a deficient number, since it is larger than the sum of its proper divisors (1).

670776181 is an equidigital number, since it uses as much as digits as its factorization.

670776181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98784, while the sum is 43.

The square root of 670776181 is about 25899.3471153232. The cubic root of 670776181 is about 875.3717847557.

The spelling of 670776181 in words is "six hundred seventy million, seven hundred seventy-six thousand, one hundred eighty-one".