66354377 has 2 divisors, whose sum is σ = 66354378. Its totient is φ = 66354376.

The previous prime is 66354347. The next prime is 66354413. The reversal of 66354377 is 77345366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59923081 + 6431296 = 7741^2 + 2536^2 .

It is a cyclic number.

It is not a de Polignac number, because 66354377 - 2⁶ = 66354313 is a prime.

It is not a weakly prime, because it can be changed into another prime (66354347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33177188 + 33177189.

It is an arithmetic number, because the mean of its divisors is an integer number (33177189).

Almost surely, 2^66354377 is an apocalyptic number.

It is an amenable number.

66354377 is a deficient number, since it is larger than the sum of its proper divisors (1).

66354377 is an equidigital number, since it uses as much as digits as its factorization.

66354377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 41.

The square root of 66354377 is about 8145.8196027165. The cubic root of 66354377 is about 404.8460055699.

The spelling of 66354377 in words is "sixty-six million, three hundred fifty-four thousand, three hundred seventy-seven".