4999661 has 2 divisors, whose sum is σ = 4999662. Its totient is φ = 4999660.

The previous prime is 4999651. The next prime is 4999667. The reversal of 4999661 is 1669994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4866436 + 133225 = 2206^2 + 365^2 .

It is a cyclic number.

It is not a de Polignac number, because 4999661 - 2⁶ = 4999597 is a prime.

It is a super-2 number, since 2×4999661² = 49993220229842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4999667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2499830 + 2499831.

It is an arithmetic number, because the mean of its divisors is an integer number (2499831).

Almost surely, 2^4999661 is an apocalyptic number.

It is an amenable number.

4999661 is a deficient number, since it is larger than the sum of its proper divisors (1).

4999661 is an equidigital number, since it uses as much as digits as its factorization.

4999661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 44.

The square root of 4999661 is about 2235.9921735105. The cubic root of 4999661 is about 170.9937300347.

The spelling of 4999661 in words is "four million, nine hundred ninety-nine thousand, six hundred sixty-one".