3660401 has 2 divisors, whose sum is σ = 3660402. Its totient is φ = 3660400.

The previous prime is 3660379. The next prime is 3660403. The reversal of 3660401 is 1040663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2560000 + 1100401 = 1600^2 + 1049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3660401 is a prime.

Together with 3660403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3660403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830200 + 1830201.

It is an arithmetic number, because the mean of its divisors is an integer number (1830201).

Almost surely, 2^3660401 is an apocalyptic number.

It is an amenable number.

3660401 is a deficient number, since it is larger than the sum of its proper divisors (1).

3660401 is an equidigital number, since it uses as much as digits as its factorization.

3660401 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 20.

The square root of 3660401 is about 1913.2174471293. The cubic root of 3660401 is about 154.1142824053.

The spelling of 3660401 in words is "three million, six hundred sixty thousand, four hundred one".