6621151 has 2 divisors, whose sum is σ = 6621152. Its totient is φ = 6621150.

The previous prime is 6621137. The next prime is 6621163. The reversal of 6621151 is 1511266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6621151 - 2⁵ = 6621119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6621191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310575 + 3310576.

It is an arithmetic number, because the mean of its divisors is an integer number (3310576).

Almost surely, 2^6621151 is an apocalyptic number.

6621151 is a deficient number, since it is larger than the sum of its proper divisors (1).

6621151 is an equidigital number, since it uses as much as digits as its factorization.

6621151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 22.

The square root of 6621151 is about 2573.1597307591. The cubic root of 6621151 is about 187.7779084791. Note that the first 3 decimals are identical.

The spelling of 6621151 in words is "six million, six hundred twenty-one thousand, one hundred fifty-one".