6599961 has 20 divisors (see below), whose sum is σ = 10441332. Its totient is φ = 4140288.

The previous prime is 6599959. The next prime is 6599963. The reversal of 6599961 is 1699956.

It is an interprime number because it is at equal distance from previous prime (6599959) and next prime (6599963).

It can be written as a sum of positive squares in 2 ways, for example, as 5433561 + 1166400 = 2331^2 + 1080^2 .

It is not a de Polignac number, because 6599961 - 2¹ = 6599959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6599963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1020 + ... + 3773.

Almost surely, 2^6599961 is an apocalyptic number.

It is an amenable number.

6599961 is a deficient number, since it is larger than the sum of its proper divisors (3841371).

6599961 is a wasteful number, since it uses less digits than its factorization.

6599961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4822 (or 4813 counting only the distinct ones).

The product of its digits is 131220, while the sum is 45.

The square root of 6599961 is about 2569.0389253571. The cubic root of 6599961 is about 187.5773760646.

The spelling of 6599961 in words is "six million, five hundred ninety-nine thousand, nine hundred sixty-one".