780668866087 has 64 divisors (see below), whose sum is σ = 892779148800. Its totient is φ = 676489766400.

The previous prime is 780668866073. The next prime is 780668866111.

780668866087 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 780668866087 - 2²⁷ = 780534648359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780668866027) 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 63 ways as a sum of consecutive naturals, for example, 1854320137 + ... + 1854320557.

It is an arithmetic number, because the mean of its divisors is an integer number (13949674200).

Almost surely, 2^780668866087 is an apocalyptic number.

780668866087 is a deficient number, since it is larger than the sum of its proper divisors (112110282713).

780668866087 is a wasteful number, since it uses less digits than its factorization.

780668866087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024.

The product of its (nonzero) digits is 260112384, while the sum is 70.

The spelling of 780668866087 in words is "seven hundred eighty billion, six hundred sixty-eight million, eight hundred sixty-six thousand, eighty-seven".