6631066978 has 8 divisors (see below), whose sum is σ = 10289586780. Its totient is φ = 3201204720.

The previous prime is 6631066933. The next prime is 6631066987. The reversal of 6631066978 is 8796601366.

It can be written as a sum of positive squares in 2 ways, for example, as 6630356329 + 710649 = 81427^2 + 843^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57164313 + ... + 57164428.

Almost surely, 2^6631066978 is an apocalyptic number.

6631066978 is a deficient number, since it is larger than the sum of its proper divisors (3658519802).

6631066978 is a wasteful number, since it uses less digits than its factorization.

6631066978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114328772.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The square root of 6631066978 is about 81431.3636015018. The cubic root of 6631066978 is about 1878.7160179906.

The spelling of 6631066978 in words is "six billion, six hundred thirty-one million, sixty-six thousand, nine hundred seventy-eight".