66020250 has 128 divisors (see below), whose sum is σ = 179262720. Its totient is φ = 16128000.

The previous prime is 66020243. The next prime is 66020287. The reversal of 66020250 is 5202066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 584194 + ... + 584306.

It is an arithmetic number, because the mean of its divisors is an integer number (1400490).

Almost surely, 2^66020250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66020250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89631360).

66020250 is an abundant number, since it is smaller than the sum of its proper divisors (113242470).

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

66020250 is a wasteful number, since it uses less digits than its factorization.

66020250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 66020250 is about 8125.2846103998. The cubic root of 66020250 is about 404.1653286998.

It can be divided in two parts, 660 and 20250, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 66020250 in words is "sixty-six million, twenty thousand, two hundred fifty".