6621071 has 2 divisors, whose sum is σ = 6621072. Its totient is φ = 6621070.

The previous prime is 6621061. The next prime is 6621103. The reversal of 6621071 is 1701266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6621071 - 2¹⁸ = 6358927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6621061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310535 + 3310536.

It is an arithmetic number, because the mean of its divisors is an integer number (3310536).

Almost surely, 2^6621071 is an apocalyptic number.

6621071 is a deficient number, since it is larger than the sum of its proper divisors (1).

6621071 is an equidigital number, since it uses as much as digits as its factorization.

6621071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 6621071 is about 2573.1441856219. The cubic root of 6621071 is about 187.7771522011. Note that the first 3 decimals are identical.

The spelling of 6621071 in words is "six million, six hundred twenty-one thousand, seventy-one".