5198661 has 20 divisors (see below), whose sum is σ = 8364972. Its totient is φ = 3198528.

The previous prime is 5198653. The next prime is 5198663. The reversal of 5198661 is 1668915.

5198661 is a `hidden beast` number, since 519 + 86 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1454436 + 3744225 = 1206^2 + 1935^2 .

It is not a de Polignac number, because 5198661 - 2³ = 5198653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5198663) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1416 + ... + 3521.

Almost surely, 2^5198661 is an apocalyptic number.

It is an amenable number.

5198661 is a deficient number, since it is larger than the sum of its proper divisors (3166311).

5198661 is a wasteful number, since it uses less digits than its factorization.

5198661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4962 (or 4953 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 5198661 is about 2280.0572361237. The cubic root of 5198661 is about 173.2329493536.

It can be divided in two parts, 519 and 8661, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 5198661 in words is "five million, one hundred ninety-eight thousand, six hundred sixty-one".