67566901 has 2 divisors, whose sum is σ = 67566902. Its totient is φ = 67566900.

The previous prime is 67566899. The next prime is 67566911. The reversal of 67566901 is 10966576.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41912676 + 25654225 = 6474^2 + 5065^2 .

It is a cyclic number.

It is not a de Polignac number, because 67566901 - 2¹ = 67566899 is a prime.

It is a super-2 number, since 2×67566901² = 9130572221487602, which contains 22 as substring.

Together with 67566899, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67566911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33783450 + 33783451.

It is an arithmetic number, because the mean of its divisors is an integer number (33783451).

Almost surely, 2^67566901 is an apocalyptic number.

It is an amenable number.

67566901 is a deficient number, since it is larger than the sum of its proper divisors (1).

67566901 is an equidigital number, since it uses as much as digits as its factorization.

67566901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 67566901 is about 8219.9088194456. The cubic root of 67566901 is about 407.2971145564.

It can be divided in two parts, 675 and 66901, that added together give a palindrome (67576).

The spelling of 67566901 in words is "sixty-seven million, five hundred sixty-six thousand, nine hundred one".