6650121187 has 2 divisors, whose sum is σ = 6650121188. Its totient is φ = 6650121186.

The previous prime is 6650121173. The next prime is 6650121253. The reversal of 6650121187 is 7811210566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6650121187 - 2⁷ = 6650121059 is a prime.

It is a super-2 number, since 2×6650121187² = 88448223603572577938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6650121587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325060593 + 3325060594.

It is an arithmetic number, because the mean of its divisors is an integer number (3325060594).

Almost surely, 2^6650121187 is an apocalyptic number.

6650121187 is a deficient number, since it is larger than the sum of its proper divisors (1).

6650121187 is an equidigital number, since it uses as much as digits as its factorization.

6650121187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 6650121187 is about 81548.2751932866. The cubic root of 6650121187 is about 1880.5137786783.

The spelling of 6650121187 in words is "six billion, six hundred fifty million, one hundred twenty-one thousand, one hundred eighty-seven".