6633449897 has 2 divisors, whose sum is σ = 6633449898. Its totient is φ = 6633449896.

The previous prime is 6633449887. The next prime is 6633449899. The reversal of 6633449897 is 7989443366.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5925304576 + 708145321 = 76976^2 + 26611^2 .

It is a cyclic number.

It is not a de Polignac number, because 6633449897 - 2⁶ = 6633449833 is a prime.

Together with 6633449899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6633449899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3316724948 + 3316724949.

It is an arithmetic number, because the mean of its divisors is an integer number (3316724949).

Almost surely, 2^6633449897 is an apocalyptic number.

It is an amenable number.

6633449897 is a deficient number, since it is larger than the sum of its proper divisors (1).

6633449897 is an equidigital number, since it uses as much as digits as its factorization.

6633449897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23514624, while the sum is 59.

The square root of 6633449897 is about 81445.9937443212. The cubic root of 6633449897 is about 1878.9410341635.

The spelling of 6633449897 in words is "six billion, six hundred thirty-three million, four hundred forty-nine thousand, eight hundred ninety-seven".