667797601 has 2 divisors, whose sum is σ = 667797602. Its totient is φ = 667797600.

The previous prime is 667797583. The next prime is 667797607. The reversal of 667797601 is 106797766.

667797601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 503957601 + 163840000 = 22449^2 + 12800^2 .

It is a cyclic number.

It is not a de Polignac number, because 667797601 - 2¹¹ = 667795553 is a prime.

It is not a weakly prime, because it can be changed into another prime (667797607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333898800 + 333898801.

It is an arithmetic number, because the mean of its divisors is an integer number (333898801).

Almost surely, 2^667797601 is an apocalyptic number.

It is an amenable number.

667797601 is a deficient number, since it is larger than the sum of its proper divisors (1).

667797601 is an equidigital number, since it uses as much as digits as its factorization.

667797601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 666792, while the sum is 49.

The square root of 667797601 is about 25841.7801437904. The cubic root of 667797601 is about 874.0741667394.

The spelling of 667797601 in words is "six hundred sixty-seven million, seven hundred ninety-seven thousand, six hundred one".