667741 has 2 divisors, whose sum is σ = 667742. Its totient is φ = 667740.

The previous prime is 667727. The next prime is 667753. The reversal of 667741 is 147766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 568516 + 99225 = 754^2 + 315^2 .

It is a cyclic number.

It is not a de Polignac number, because 667741 - 2⁹ = 667229 is a prime.

667741 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333870 + 333871.

It is an arithmetic number, because the mean of its divisors is an integer number (333871).

2⁶⁶⁷⁷⁴¹ is an apocalyptic number.

It is an amenable number.

667741 is a deficient number, since it is larger than the sum of its proper divisors (1).

667741 is an equidigital number, since it uses as much as digits as its factorization.

667741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 31.

The square root of 667741 is about 817.1542082129. The cubic root of 667741 is about 87.4049471198.

The spelling of 667741 in words is "six hundred sixty-seven thousand, seven hundred forty-one".