66708101 has 4 divisors (see below), whose sum is σ = 66801600. Its totient is φ = 66614604.

The previous prime is 66708097. The next prime is 66708113. The reversal of 66708101 is 10180766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66708101 - 2² = 66708097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66701101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45671 + ... + 47108.

It is an arithmetic number, because the mean of its divisors is an integer number (16700400).

Almost surely, 2^66708101 is an apocalyptic number.

It is an amenable number.

66708101 is a deficient number, since it is larger than the sum of its proper divisors (93499).

66708101 is an equidigital number, since it uses as much as digits as its factorization.

66708101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93498.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 66708101 is about 8167.5027395159. The cubic root of 66708101 is about 405.5641196359.

Adding to 66708101 its reverse (10180766), we get a palindrome (76888867).

The spelling of 66708101 in words is "sixty-six million, seven hundred eight thousand, one hundred one".