666250048 has 42 divisors (see below), whose sum is σ = 1395384306. Its totient is φ = 315581184.

The previous prime is 666250021. The next prime is 666250069. The reversal of 666250048 is 840052666.

It can be written as a sum of positive squares in only one way, i.e., 598878784 + 67371264 = 24472^2 + 8208^2 .

It is a junction number, because it is equal to n+sod(n) for n = 666249989 and 666250016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8686 + ... + 37522.

Almost surely, 2^666250048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666250048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (697692153).

666250048 is an abundant number, since it is smaller than the sum of its proper divisors (729134258).

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

666250048 is a wasteful number, since it uses less digits than its factorization.

666250048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28887 (or 28858 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 666250048 is about 25811.8199280872. The cubic root of 666250048 is about 873.3984518518.

The spelling of 666250048 in words is "six hundred sixty-six million, two hundred fifty thousand, forty-eight".