667163551 has 2 divisors, whose sum is σ = 667163552. Its totient is φ = 667163550.

The previous prime is 667163537. The next prime is 667163591. The reversal of 667163551 is 155361766.

It is an a-pointer prime, because the next prime (667163591) can be obtained adding 667163551 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667163551 - 2¹⁷ = 667032479 is a prime.

It is equal to p_34638916 and since 667163551 and 34638916 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667163501) 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, 333581775 + 333581776.

It is an arithmetic number, because the mean of its divisors is an integer number (333581776).

Almost surely, 2^667163551 is an apocalyptic number.

667163551 is a deficient number, since it is larger than the sum of its proper divisors (1).

667163551 is an equidigital number, since it uses as much as digits as its factorization.

667163551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 40.

The square root of 667163551 is about 25829.5093062180. The cubic root of 667163551 is about 873.7974450616.

It can be divided in two parts, 66 and 7163551, that added together give a palindrome (7163617).

The spelling of 667163551 in words is "six hundred sixty-seven million, one hundred sixty-three thousand, five hundred fifty-one".