66356201 has 2 divisors, whose sum is σ = 66356202. Its totient is φ = 66356200.

The previous prime is 66356177. The next prime is 66356203. The reversal of 66356201 is 10265366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64818601 + 1537600 = 8051^2 + 1240^2 .

It is a cyclic number.

It is not a de Polignac number, because 66356201 - 2¹⁴ = 66339817 is a prime.

It is a super-2 number, since 2×66356201² = 8806290822304802, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 66356203, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (66356203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33178100 + 33178101.

It is an arithmetic number, because the mean of its divisors is an integer number (33178101).

Almost surely, 2^66356201 is an apocalyptic number.

It is an amenable number.

66356201 is a deficient number, since it is larger than the sum of its proper divisors (1).

66356201 is an equidigital number, since it uses as much as digits as its factorization.

66356201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 66356201 is about 8145.9315612151. The cubic root of 66356201 is about 404.8497151084.

The spelling of 66356201 in words is "sixty-six million, three hundred fifty-six thousand, two hundred one".