6180661 has 2 divisors, whose sum is σ = 6180662. Its totient is φ = 6180660.

The previous prime is 6180659. The next prime is 6180667. The reversal of 6180661 is 1660816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5336100 + 844561 = 2310^2 + 919^2 .

It is a cyclic number.

It is not a de Polignac number, because 6180661 - 2¹ = 6180659 is a prime.

Together with 6180659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6180667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3090330 + 3090331.

It is an arithmetic number, because the mean of its divisors is an integer number (3090331).

Almost surely, 2^6180661 is an apocalyptic number.

It is an amenable number.

6180661 is a deficient number, since it is larger than the sum of its proper divisors (1).

6180661 is an equidigital number, since it uses as much as digits as its factorization.

6180661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 6180661 is about 2486.0935219738. The cubic root of 6180661 is about 183.5178480265.

The spelling of 6180661 in words is "six million, one hundred eighty thousand, six hundred sixty-one".