667269541 has 2 divisors, whose sum is σ = 667269542. Its totient is φ = 667269540.

The previous prime is 667269539. The next prime is 667269587. The reversal of 667269541 is 145962766.

It is an a-pointer prime, because the next prime (667269587) can be obtained adding 667269541 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 355888225 + 311381316 = 18865^2 + 17646^2 .

It is a cyclic number.

It is not a de Polignac number, because 667269541 - 2¹ = 667269539 is a prime.

Together with 667269539, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 667269491 and 667269500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667269241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333634770 + 333634771.

It is an arithmetic number, because the mean of its divisors is an integer number (333634771).

Almost surely, 2^667269541 is an apocalyptic number.

It is an amenable number.

667269541 is a deficient number, since it is larger than the sum of its proper divisors (1).

667269541 is an equidigital number, since it uses as much as digits as its factorization.

667269541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 46.

The square root of 667269541 is about 25831.5609478018. The cubic root of 667269541 is about 873.8437150190.

It can be divided in two parts, 66726 and 9541, that added together give a palindrome (76267).

The spelling of 667269541 in words is "six hundred sixty-seven million, two hundred sixty-nine thousand, five hundred forty-one".