667827101 has 2 divisors, whose sum is σ = 667827102. Its totient is φ = 667827100.

The previous prime is 667827091. The next prime is 667827131. The reversal of 667827101 is 101728766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 606439876 + 61387225 = 24626^2 + 7835^2 .

It is a cyclic number.

It is not a de Polignac number, because 667827101 - 2⁶ = 667827037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667827131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333913550 + 333913551.

It is an arithmetic number, because the mean of its divisors is an integer number (333913551).

Almost surely, 2^667827101 is an apocalyptic number.

It is an amenable number.

667827101 is a deficient number, since it is larger than the sum of its proper divisors (1).

667827101 is an equidigital number, since it uses as much as digits as its factorization.

667827101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 667827101 is about 25842.3509185987. The cubic root of 667827101 is about 874.0870373099.

The spelling of 667827101 in words is "six hundred sixty-seven million, eight hundred twenty-seven thousand, one hundred one".