6145661 has 2 divisors, whose sum is σ = 6145662. Its totient is φ = 6145660.

The previous prime is 6145649. The next prime is 6145693. The reversal of 6145661 is 1665416.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5808100 + 337561 = 2410^2 + 581^2 .

It is a cyclic number.

It is not a de Polignac number, because 6145661 - 2⁶ = 6145597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6145621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3072830 + 3072831.

It is an arithmetic number, because the mean of its divisors is an integer number (3072831).

Almost surely, 2^6145661 is an apocalyptic number.

It is an amenable number.

6145661 is a deficient number, since it is larger than the sum of its proper divisors (1).

6145661 is an equidigital number, since it uses as much as digits as its factorization.

6145661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 29.

The square root of 6145661 is about 2479.0443723338. The cubic root of 6145661 is about 183.1707822724.

The spelling of 6145661 in words is "six million, one hundred forty-five thousand, six hundred sixty-one".