505166866672 has 80 divisors (see below), whose sum is σ = 1068879830368. Its totient is φ = 229875978240.

The previous prime is 505166866669. The next prime is 505166866717. The reversal of 505166866672 is 276668661505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63055147 + ... + 63063157.

Almost surely, 2^505166866672 is an apocalyptic number.

505166866672 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505166866672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (534439915184).

505166866672 is an abundant number, since it is smaller than the sum of its proper divisors (563712963696).

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

505166866672 is a wasteful number, since it uses less digits than its factorization.

505166866672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12258 (or 12252 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 58.

The spelling of 505166866672 in words is "five hundred five billion, one hundred sixty-six million, eight hundred sixty-six thousand, six hundred seventy-two".