660411001 has 2 divisors, whose sum is σ = 660411002. Its totient is φ = 660411000.

The previous prime is 660410999. The next prime is 660411077. The reversal of 660411001 is 100114066.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 562875625 + 97535376 = 23725^2 + 9876^2 .

It is a cyclic number.

It is not a de Polignac number, because 660411001 - 2¹ = 660410999 is a prime.

It is a super-2 number, since 2×660411001² = 872285380483644002, which contains 22 as substring.

Together with 660410999, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 660411001.

It is not a weakly prime, because it can be changed into another prime (660411701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330205500 + 330205501.

It is an arithmetic number, because the mean of its divisors is an integer number (330205501).

Almost surely, 2^660411001 is an apocalyptic number.

It is an amenable number.

660411001 is a deficient number, since it is larger than the sum of its proper divisors (1).

660411001 is an equidigital number, since it uses as much as digits as its factorization.

660411001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 660411001 is about 25698.4630085147. The cubic root of 660411001 is about 870.8394597088.

Adding to 660411001 its reverse (100114066), we get a palindrome (760525067).

The spelling of 660411001 in words is "six hundred sixty million, four hundred eleven thousand, one".