4998661 has 4 divisors (see below), whose sum is σ = 5025024. Its totient is φ = 4972300.

The previous prime is 4998647. The next prime is 4998667. The reversal of 4998661 is 1668994.

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: 1668994 = 2 ⋅834497.

It is a cyclic number.

It is not a de Polignac number, because 4998661 - 2¹⁵ = 4965893 is a prime.

It is a super-2 number, since 2×4998661² = 49973223585842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4998667) 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, 12895 + ... + 13276.

It is an arithmetic number, because the mean of its divisors is an integer number (1256256).

Almost surely, 2^4998661 is an apocalyptic number.

It is an amenable number.

4998661 is a deficient number, since it is larger than the sum of its proper divisors (26363).

4998661 is a wasteful number, since it uses less digits than its factorization.

4998661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26362.

The product of its digits is 93312, while the sum is 43.

The square root of 4998661 is about 2235.7685479495. The cubic root of 4998661 is about 170.9823289196.

The spelling of 4998661 in words is "four million, nine hundred ninety-eight thousand, six hundred sixty-one".