6247661 has 4 divisors (see below), whose sum is σ = 7140192. Its totient is φ = 5355132.

The previous prime is 6247613. The next prime is 6247667. The reversal of 6247661 is 1667426.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1667426 = 2 ⋅833713.

It is a cyclic number.

It is not a de Polignac number, because 6247661 - 2²² = 2053357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6247667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446255 + ... + 446268.

It is an arithmetic number, because the mean of its divisors is an integer number (1785048).

Almost surely, 2^6247661 is an apocalyptic number.

It is an amenable number.

6247661 is a deficient number, since it is larger than the sum of its proper divisors (892531).

6247661 is an equidigital number, since it uses as much as digits as its factorization.

6247661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892530.

The product of its digits is 12096, while the sum is 32.

The square root of 6247661 is about 2499.5321562244. The cubic root of 6247661 is about 184.1785935325.

The spelling of 6247661 in words is "six million, two hundred forty-seven thousand, six hundred sixty-one".