66237851 has 2 divisors, whose sum is σ = 66237852. Its totient is φ = 66237850.

The previous prime is 66237833. The next prime is 66237877. The reversal of 66237851 is 15873266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66237851 - 2²² = 62043547 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66237251) 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, 33118925 + 33118926.

It is an arithmetic number, because the mean of its divisors is an integer number (33118926).

Almost surely, 2^66237851 is an apocalyptic number.

66237851 is a deficient number, since it is larger than the sum of its proper divisors (1).

66237851 is an equidigital number, since it uses as much as digits as its factorization.

66237851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

The square root of 66237851 is about 8138.6639566946. The cubic root of 66237851 is about 404.6088811593.

The spelling of 66237851 in words is "sixty-six million, two hundred thirty-seven thousand, eight hundred fifty-one".