667755013 has 2 divisors, whose sum is σ = 667755014. Its totient is φ = 667755012.

The previous prime is 667755001. The next prime is 667755043. The reversal of 667755013 is 310557766.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 617373409 + 50381604 = 24847^2 + 7098^2 .

It is a cyclic number.

It is not a de Polignac number, because 667755013 - 2¹⁷ = 667623941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667755043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333877506 + 333877507.

It is an arithmetic number, because the mean of its divisors is an integer number (333877507).

Almost surely, 2^667755013 is an apocalyptic number.

It is an amenable number.

667755013 is a deficient number, since it is larger than the sum of its proper divisors (1).

667755013 is an equidigital number, since it uses as much as digits as its factorization.

667755013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 132300, while the sum is 40.

The square root of 667755013 is about 25840.9561162121. The cubic root of 667755013 is about 874.0555853300.

The spelling of 667755013 in words is "six hundred sixty-seven million, seven hundred fifty-five thousand, thirteen".