2006651 has 2 divisors, whose sum is σ = 2006652. Its totient is φ = 2006650.

The previous prime is 2006623. The next prime is 2006657. The reversal of 2006651 is 1566002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2006651 - 2¹⁸ = 1744507 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2006657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1003325 + 1003326.

It is an arithmetic number, because the mean of its divisors is an integer number (1003326).

2^2006651 is an apocalyptic number.

2006651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2006651 is an equidigital number, since it uses as much as digits as its factorization.

2006651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 2006651 is about 1416.5630942531. The cubic root of 2006651 is about 126.1316127077.

The spelling of 2006651 in words is "two million, six thousand, six hundred fifty-one".