6657280481 has 4 divisors (see below), whose sum is σ = 6657476292. Its totient is φ = 6657084672.

The previous prime is 6657280459. The next prime is 6657280489. The reversal of 6657280481 is 1840827566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1840827566 = 2 ⋅920413783.

It can be written as a sum of positive squares in 2 ways, for example, as 4954892881 + 1702387600 = 70391^2 + 41260^2 .

It is a cyclic number.

It is not a de Polignac number, because 6657280481 - 2⁶ = 6657280417 is a prime.

It is a super-2 number, since 2×6657280481² = 88638766805407182722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6657280489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32216 + ... + 119801.

It is an arithmetic number, because the mean of its divisors is an integer number (1664369073).

Almost surely, 2^6657280481 is an apocalyptic number.

It is an amenable number.

6657280481 is a deficient number, since it is larger than the sum of its proper divisors (195811).

6657280481 is a wasteful number, since it uses less digits than its factorization.

6657280481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195810.

The product of its (nonzero) digits is 645120, while the sum is 47.

The square root of 6657280481 is about 81592.1594333671. The cubic root of 6657280481 is about 1881.1883690203.

The spelling of 6657280481 in words is "six billion, six hundred fifty-seven million, two hundred eighty thousand, four hundred eighty-one".