5666636478 has 16 divisors (see below), whose sum is σ = 11336021136. Its totient is φ = 1888420800.

The previous prime is 5666636471. The next prime is 5666636531. The reversal of 5666636478 is 8746366665.

It is a super-2 number, since 2×5666636478² = 64221537947600488968, which contains 22 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 (5666636471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87201 + ... + 137612.

It is an arithmetic number, because the mean of its divisors is an integer number (708501321).

Almost surely, 2^5666636478 is an apocalyptic number.

5666636478 is an abundant number, since it is smaller than the sum of its proper divisors (5669384658).

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

5666636478 is a wasteful number, since it uses less digits than its factorization.

5666636478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229019.

The product of its digits is 26127360, while the sum is 57.

The square root of 5666636478 is about 75277.0647541467. The cubic root of 5666636478 is about 1782.8239144562.

The spelling of 5666636478 in words is "five billion, six hundred sixty-six million, six hundred thirty-six thousand, four hundred seventy-eight".