6651187 has 2 divisors, whose sum is σ = 6651188. Its totient is φ = 6651186.

The previous prime is 6651181. The next prime is 6651217. The reversal of 6651187 is 7811566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6651187 - 2¹⁵ = 6618419 is a prime.

It is not a weakly prime, because it can be changed into another prime (6651181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325593 + 3325594.

It is an arithmetic number, because the mean of its divisors is an integer number (3325594).

Almost surely, 2^6651187 is an apocalyptic number.

6651187 is a deficient number, since it is larger than the sum of its proper divisors (1).

6651187 is an equidigital number, since it uses as much as digits as its factorization.

6651187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 34.

The square root of 6651187 is about 2578.9895308047. The cubic root of 6651187 is about 188.0614236445.

It can be divided in two parts, 665118 and 7, that multiplied together give a triangular number (4655826 = T₃₀₅₁).

The spelling of 6651187 in words is "six million, six hundred fifty-one thousand, one hundred eighty-seven".