6287661 has 12 divisors (see below), whose sum is σ = 9111388. Its totient is φ = 4178304.

The previous prime is 6287647. The next prime is 6287713. The reversal of 6287661 is 1667826.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1425636 + 4862025 = 1194^2 + 2205^2 .

It is not a de Polignac number, because 6287661 - 2⁵ = 6287629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6287621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2421 + ... + 4293.

Almost surely, 2^6287661 is an apocalyptic number.

It is an amenable number.

6287661 is a deficient number, since it is larger than the sum of its proper divisors (2823727).

6287661 is a wasteful number, since it uses less digits than its factorization.

6287661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252 (or 2249 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 6287661 is about 2507.5208872510. The cubic root of 6287661 is about 184.5708190907.

The spelling of 6287661 in words is "six million, two hundred eighty-seven thousand, six hundred sixty-one".