866827407650478 has 32 divisors (see below), whose sum is σ = 1789583390039040. Its totient is φ = 279621084113280.

The previous prime is 866827407650473. The next prime is 866827407650497. The reversal of 866827407650478 is 874056704728668.

It is a super-3 number, since 3×866827407650478³ (a number of 46 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866827407650471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76775601 + ... + 87339267.

It is an arithmetic number, because the mean of its divisors is an integer number (55924480938720).

Almost surely, 2^{866827407650478} is an apocalyptic number.

866827407650478 is an abundant number, since it is smaller than the sum of its proper divisors (922755982388562).

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

866827407650478 is a wasteful number, since it uses less digits than its factorization.

866827407650478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11004872.

The product of its (nonzero) digits is 6069288960, while the sum is 78.

The spelling of 866827407650478 in words is "eight hundred sixty-six trillion, eight hundred twenty-seven billion, four hundred seven million, six hundred fifty thousand, four hundred seventy-eight".