66100841 has 2 divisors, whose sum is σ = 66100842. Its totient is φ = 66100840.

The previous prime is 66100823. The next prime is 66100871. The reversal of 66100841 is 14800166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43099225 + 23001616 = 6565^2 + 4796^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66100841 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66100841.

It is not a weakly prime, because it can be changed into another prime (66100871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33050420 + 33050421.

It is an arithmetic number, because the mean of its divisors is an integer number (33050421).

Almost surely, 2^66100841 is an apocalyptic number.

It is an amenable number.

66100841 is a deficient number, since it is larger than the sum of its proper divisors (1).

66100841 is an equidigital number, since it uses as much as digits as its factorization.

66100841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 66100841 is about 8130.2423703110. The cubic root of 66100841 is about 404.3297168655.

The spelling of 66100841 in words is "sixty-six million, one hundred thousand, eight hundred forty-one".