66267250 has 64 divisors (see below), whose sum is σ = 149310720. Its totient is φ = 21513600.

The previous prime is 66267247. The next prime is 66267251. The reversal of 66267250 is 5276266.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66267251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32254 + ... + 34246.

It is an arithmetic number, because the mean of its divisors is an integer number (2332980).

Almost surely, 2^66267250 is an apocalyptic number.

66267250 is an abundant number, since it is smaller than the sum of its proper divisors (83043470).

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

66267250 is a wasteful number, since it uses less digits than its factorization.

66267250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036 (or 2026 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 66267250 is about 8140.4698881576. The cubic root of 66267250 is about 404.6687328248.

The spelling of 66267250 in words is "sixty-six million, two hundred sixty-seven thousand, two hundred fifty".