66701101 has 2 divisors, whose sum is σ = 66701102. Its totient is φ = 66701100.

The previous prime is 66701099. The next prime is 66701111. The reversal of 66701101 is 10110766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34222500 + 32478601 = 5850^2 + 5699^2 .

It is a cyclic number.

It is not a de Polignac number, because 66701101 - 2¹ = 66701099 is a prime.

It is a super-2 number, since 2×66701101² = 8898073749224402, which contains 22 as substring.

Together with 66701099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66701111) 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, 33350550 + 33350551.

It is an arithmetic number, because the mean of its divisors is an integer number (33350551).

Almost surely, 2^66701101 is an apocalyptic number.

It is an amenable number.

66701101 is a deficient number, since it is larger than the sum of its proper divisors (1).

66701101 is an equidigital number, since it uses as much as digits as its factorization.

66701101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 66701101 is about 8167.0742007159. The cubic root of 66701101 is about 405.5499332123.

Adding to 66701101 its reverse (10110766), we get a palindrome (76811867).

The spelling of 66701101 in words is "sixty-six million, seven hundred one thousand, one hundred one".