6453661 has 2 divisors, whose sum is σ = 6453662. Its totient is φ = 6453660.

The previous prime is 6453649. The next prime is 6453677. The reversal of 6453661 is 1663546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5433561 + 1020100 = 2331^2 + 1010^2 .

It is a cyclic number.

It is not a de Polignac number, because 6453661 - 2⁷ = 6453533 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 (6453061) 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, 3226830 + 3226831.

It is an arithmetic number, because the mean of its divisors is an integer number (3226831).

Almost surely, 2^6453661 is an apocalyptic number.

It is an amenable number.

6453661 is a deficient number, since it is larger than the sum of its proper divisors (1).

6453661 is an equidigital number, since it uses as much as digits as its factorization.

6453661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 31.

The square root of 6453661 is about 2540.4056762651. The cubic root of 6453661 is about 186.1810104378.

The spelling of 6453661 in words is "six million, four hundred fifty-three thousand, six hundred sixty-one".