6644506147 has 2 divisors, whose sum is σ = 6644506148. Its totient is φ = 6644506146.

The previous prime is 6644506097. The next prime is 6644506163. The reversal of 6644506147 is 7416054466.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6644506147 is a prime.

It is not a weakly prime, because it can be changed into another prime (6644506177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3322253073 + 3322253074.

It is an arithmetic number, because the mean of its divisors is an integer number (3322253074).

Almost surely, 2^6644506147 is an apocalyptic number.

6644506147 is a deficient number, since it is larger than the sum of its proper divisors (1).

6644506147 is an equidigital number, since it uses as much as digits as its factorization.

6644506147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 43.

The square root of 6644506147 is about 81513.8402174747. The cubic root of 6644506147 is about 1879.9843580825.

The spelling of 6644506147 in words is "six billion, six hundred forty-four million, five hundred six thousand, one hundred forty-seven".