6634472557 has 2 divisors, whose sum is σ = 6634472558. Its totient is φ = 6634472556.

The previous prime is 6634472549. The next prime is 6634472561. The reversal of 6634472557 is 7552744366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4320958756 + 2313513801 = 65734^2 + 48099^2 .

It is a cyclic number.

It is not a de Polignac number, because 6634472557 - 2³ = 6634472549 is a prime.

It is a super-3 number, since 3×6634472557³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 6634472557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6634472527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3317236278 + 3317236279.

It is an arithmetic number, because the mean of its divisors is an integer number (3317236279).

Almost surely, 2^6634472557 is an apocalyptic number.

It is an amenable number.

6634472557 is a deficient number, since it is larger than the sum of its proper divisors (1).

6634472557 is an equidigital number, since it uses as much as digits as its factorization.

6634472557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4233600, while the sum is 49.

The square root of 6634472557 is about 81452.2716503352. The cubic root of 6634472557 is about 1879.0375861906.

Subtracting 6634472557 from its reverse (7552744366), we obtain a square (918271809 = 30303²).

The spelling of 6634472557 in words is "six billion, six hundred thirty-four million, four hundred seventy-two thousand, five hundred fifty-seven".