66752201 has 2 divisors, whose sum is σ = 66752202. Its totient is φ = 66752200.

The previous prime is 66752197. The next prime is 66752219. The reversal of 66752201 is 10225766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62425801 + 4326400 = 7901^2 + 2080^2 .

It is a cyclic number.

It is not a de Polignac number, because 66752201 - 2² = 66752197 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66752221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33376100 + 33376101.

It is an arithmetic number, because the mean of its divisors is an integer number (33376101).

Almost surely, 2^66752201 is an apocalyptic number.

It is an amenable number.

66752201 is a deficient number, since it is larger than the sum of its proper divisors (1).

66752201 is an equidigital number, since it uses as much as digits as its factorization.

66752201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 66752201 is about 8170.2020170862. The cubic root of 66752201 is about 405.6534712918.

Adding to 66752201 its reverse (10225766), we get a palindrome (76977967).

The spelling of 66752201 in words is "sixty-six million, seven hundred fifty-two thousand, two hundred one".