66701849 has 2 divisors, whose sum is σ = 66701850. Its totient is φ = 66701848.

The previous prime is 66701839. The next prime is 66701857. The reversal of 66701849 is 94810766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46676224 + 20025625 = 6832^2 + 4475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66701849 is a prime.

It is not a weakly prime, because it can be changed into another prime (66701809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33350924 + 33350925.

It is an arithmetic number, because the mean of its divisors is an integer number (33350925).

Almost surely, 2^66701849 is an apocalyptic number.

It is an amenable number.

66701849 is a deficient number, since it is larger than the sum of its proper divisors (1).

66701849 is an equidigital number, since it uses as much as digits as its factorization.

66701849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 66701849 is about 8167.1199942207. The cubic root of 66701849 is about 405.5514491804.

The spelling of 66701849 in words is "sixty-six million, seven hundred one thousand, eight hundred forty-nine".