6629891 has 2 divisors, whose sum is σ = 6629892. Its totient is φ = 6629890.

The previous prime is 6629873. The next prime is 6629897. The reversal of 6629891 is 1989266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6629891 - 2¹⁴ = 6613507 is a prime.

It is a Chen prime.

It is a plaindrome in base 12.

It is not a weakly prime, because it can be changed into another prime (6629897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3314945 + 3314946.

It is an arithmetic number, because the mean of its divisors is an integer number (3314946).

Almost surely, 2^6629891 is an apocalyptic number.

6629891 is a deficient number, since it is larger than the sum of its proper divisors (1).

6629891 is an equidigital number, since it uses as much as digits as its factorization.

6629891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 41.

The square root of 6629891 is about 2574.8574717836. The cubic root of 6629891 is about 187.8604951937.

The spelling of 6629891 in words is "six million, six hundred twenty-nine thousand, eight hundred ninety-one".