56673427866 has 64 divisors (see below), whose sum is σ = 125959311360. Its totient is φ = 16854168960.

The previous prime is 56673427861. The next prime is 56673427873. The reversal of 56673427866 is 66872437665.

56673427866 = T₃₀₃ + T₃₀₄ + ... + T₆₉₇₉.

It is not an unprimeable number, because it can be changed into a prime (56673427861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2351670 + ... + 2375646.

It is an arithmetic number, because the mean of its divisors is an integer number (1968114240).

Almost surely, 2^56673427866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56673427866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62979655680).

56673427866 is an abundant number, since it is smaller than the sum of its proper divisors (69285883494).

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

56673427866 is a wasteful number, since it uses less digits than its factorization.

56673427866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24659.

The product of its digits is 60963840, while the sum is 60.

The spelling of 56673427866 in words is "fifty-six billion, six hundred seventy-three million, four hundred twenty-seven thousand, eight hundred sixty-six".