61660201 has 2 divisors, whose sum is σ = 61660202. Its totient is φ = 61660200.

The previous prime is 61660189. The next prime is 61660213. The reversal of 61660201 is 10206616.

It is a balanced prime because it is at equal distance from previous prime (61660189) and next prime (61660213).

It can be written as a sum of positive squares in only one way, i.e., 46566976 + 15093225 = 6824^2 + 3885^2 .

It is a cyclic number.

It is not a de Polignac number, because 61660201 - 2¹¹ = 61658153 is a prime.

It is not a weakly prime, because it can be changed into another prime (61660231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30830100 + 30830101.

It is an arithmetic number, because the mean of its divisors is an integer number (30830101).

Almost surely, 2^61660201 is an apocalyptic number.

It is an amenable number.

61660201 is a deficient number, since it is larger than the sum of its proper divisors (1).

61660201 is an equidigital number, since it uses as much as digits as its factorization.

61660201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 61660201 is about 7852.4009704039. The cubic root of 61660201 is about 395.0647781386.

Adding to 61660201 its reverse (10206616), we get a palindrome (71866817).

The spelling of 61660201 in words is "sixty-one million, six hundred sixty thousand, two hundred one".