6663261155 has 8 divisors (see below), whose sum is σ = 8005777584. Its totient is φ = 5324032800.

The previous prime is 6663261151. The next prime is 6663261181. The reversal of 6663261155 is 5511623666.

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

It is not a de Polignac number, because 6663261155 - 2² = 6663261151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6663261151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 817556 + ... + 825665.

It is an arithmetic number, because the mean of its divisors is an integer number (1000722198).

Almost surely, 2^6663261155 is an apocalyptic number.

6663261155 is a deficient number, since it is larger than the sum of its proper divisors (1342516429).

6663261155 is a wasteful number, since it uses less digits than its factorization.

6663261155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644037.

The product of its digits is 194400, while the sum is 41.

The square root of 6663261155 is about 81628.8010141029. The cubic root of 6663261155 is about 1881.7515322607.

The spelling of 6663261155 in words is "six billion, six hundred sixty-three million, two hundred sixty-one thousand, one hundred fifty-five".