6618901 has 2 divisors, whose sum is σ = 6618902. Its totient is φ = 6618900.

The previous prime is 6618853. The next prime is 6618907. The reversal of 6618901 is 1098166.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5616900 + 1002001 = 2370^2 + 1001^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6618901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6618907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3309450 + 3309451.

It is an arithmetic number, because the mean of its divisors is an integer number (3309451).

Almost surely, 2^6618901 is an apocalyptic number.

It is an amenable number.

6618901 is a deficient number, since it is larger than the sum of its proper divisors (1).

6618901 is an equidigital number, since it uses as much as digits as its factorization.

6618901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 6618901 is about 2572.7224879493. The cubic root of 6618901 is about 187.7566358353.

The spelling of 6618901 in words is "six million, six hundred eighteen thousand, nine hundred one".