6651679 has 2 divisors, whose sum is σ = 6651680. Its totient is φ = 6651678.

The previous prime is 6651661. The next prime is 6651683. The reversal of 6651679 is 9761566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6651679 - 2⁵ = 6651647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6651649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325839 + 3325840.

It is an arithmetic number, because the mean of its divisors is an integer number (3325840).

Almost surely, 2^6651679 is an apocalyptic number.

6651679 is a deficient number, since it is larger than the sum of its proper divisors (1).

6651679 is an equidigital number, since it uses as much as digits as its factorization.

6651679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 40.

The square root of 6651679 is about 2579.0849152364. The cubic root of 6651679 is about 188.0660606082.

The spelling of 6651679 in words is "six million, six hundred fifty-one thousand, six hundred seventy-nine".