6656877553 has 8 divisors (see below), whose sum is σ = 6770601000. Its totient is φ = 6544019328.

The previous prime is 6656877541. The next prime is 6656877581. The reversal of 6656877553 is 3557786566.

It can be written as a sum of positive squares in 4 ways, for example, as 252396769 + 6404480784 = 15887^2 + 80028^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6656877553 - 2²¹ = 6654780401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6656877523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200778 + ... + 231571.

It is an arithmetic number, because the mean of its divisors is an integer number (846325125).

Almost surely, 2^6656877553 is an apocalyptic number.

It is an amenable number.

6656877553 is a deficient number, since it is larger than the sum of its proper divisors (113723447).

6656877553 is a wasteful number, since it uses less digits than its factorization.

6656877553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432611.

The product of its digits is 31752000, while the sum is 58.

The square root of 6656877553 is about 81589.6902371862. The cubic root of 6656877553 is about 1881.1504156467.

The spelling of 6656877553 in words is "six billion, six hundred fifty-six million, eight hundred seventy-seven thousand, five hundred fifty-three".