66983250 has 128 divisors (see below), whose sum is σ = 179232768. Its totient is φ = 16632000.

The previous prime is 66983233. The next prime is 66983251. The reversal of 66983250 is 5238966.

It is a junction number, because it is equal to n+sod(n) for n = 66983199 and 66983208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66983251) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 999717 + ... + 999783.

It is an arithmetic number, because the mean of its divisors is an integer number (1400256).

Almost surely, 2^66983250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66983250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89616384).

66983250 is an abundant number, since it is smaller than the sum of its proper divisors (112249518).

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

66983250 is a wasteful number, since it uses less digits than its factorization.

66983250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 66983250 is about 8184.3295388199. The cubic root of 66983250 is about 406.1209609895.

The spelling of 66983250 in words is "sixty-six million, nine hundred eighty-three thousand, two hundred fifty".