666007767110778 has 32 divisors (see below), whose sum is σ = 1335142341254400. Its totient is φ = 221481493364736.

The previous prime is 666007767110773. The next prime is 666007767110783. The reversal of 666007767110778 is 877011767700666.

It is an interprime number because it is at equal distance from previous prime (666007767110773) and next prime (666007767110783).

It is not an unprimeable number, because it can be changed into a prime (666007767110773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63951738 + ... + 73633146.

It is an arithmetic number, because the mean of its divisors is an integer number (41723198164200).

Almost surely, 2^{666007767110778} is an apocalyptic number.

666007767110778 is an abundant number, since it is smaller than the sum of its proper divisors (669134574143622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666007767110778 is a wasteful number, since it uses less digits than its factorization.

666007767110778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9708326.

The product of its (nonzero) digits is 174254976, while the sum is 69.

The spelling of 666007767110778 in words is "six hundred sixty-six trillion, seven billion, seven hundred sixty-seven million, one hundred ten thousand, seven hundred seventy-eight".