6151661 has 2 divisors, whose sum is σ = 6151662. Its totient is φ = 6151660.

The previous prime is 6151597. The next prime is 6151669. The reversal of 6151661 is 1661516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3976036 + 2175625 = 1994^2 + 1475^2 .

It is a cyclic number.

It is not a de Polignac number, because 6151661 - 2⁶ = 6151597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6151661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6151669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3075830 + 3075831.

It is an arithmetic number, because the mean of its divisors is an integer number (3075831).

Almost surely, 2^6151661 is an apocalyptic number.

It is an amenable number.

6151661 is a deficient number, since it is larger than the sum of its proper divisors (1).

6151661 is an equidigital number, since it uses as much as digits as its factorization.

6151661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 26.

The square root of 6151661 is about 2480.2542208411. The cubic root of 6151661 is about 183.2303726744.

The spelling of 6151661 in words is "six million, one hundred fifty-one thousand, six hundred sixty-one".