6618761 has 2 divisors, whose sum is σ = 6618762. Its totient is φ = 6618760.

The previous prime is 6618751. The next prime is 6618769. The reversal of 6618761 is 1678166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3728761 + 2890000 = 1931^2 + 1700^2 .

It is a cyclic number.

It is not a de Polignac number, because 6618761 - 2¹⁴ = 6602377 is a prime.

It is not a weakly prime, because it can be changed into another prime (6618769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3309380 + 3309381.

It is an arithmetic number, because the mean of its divisors is an integer number (3309381).

Almost surely, 2^6618761 is an apocalyptic number.

It is an amenable number.

6618761 is a deficient number, since it is larger than the sum of its proper divisors (1).

6618761 is an equidigital number, since it uses as much as digits as its factorization.

6618761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 6618761 is about 2572.6952792742. The cubic root of 6618761 is about 187.7553120448.

The spelling of 6618761 in words is "six million, six hundred eighteen thousand, seven hundred sixty-one".