66602250 has 320 divisors, whose sum is σ = 228324096. Its totient is φ = 14256000.

The previous prime is 66602233. The next prime is 66602251. The reversal of 66602250 is 5220666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (66602251) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2895739 + ... + 2895761.

Almost surely, 2^66602250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66602250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114162048).

66602250 is an abundant number, since it is smaller than the sum of its proper divisors (161721846).

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

66602250 is a wasteful number, since it uses less digits than its factorization.

66602250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 66602250 is about 8161.0201568186. The cubic root of 66602250 is about 405.3494925592.

The spelling of 66602250 in words is "sixty-six million, six hundred two thousand, two hundred fifty".