66366280 has 32 divisors (see below), whose sum is σ = 149572800. Its totient is φ = 26502336.

The previous prime is 66366277. The next prime is 66366281. The reversal of 66366280 is 8266366.

It is not an unprimeable number, because it can be changed into a prime (66366281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34381 + ... + 36259.

It is an arithmetic number, because the mean of its divisors is an integer number (4674150).

Almost surely, 2^66366280 is an apocalyptic number.

It is an amenable number.

66366280 is an abundant number, since it is smaller than the sum of its proper divisors (83206520).

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

66366280 is a wasteful number, since it uses less digits than its factorization.

66366280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773 (or 2769 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 66366280 is about 8146.5501901111. The cubic root of 66366280 is about 404.8702119303.

The spelling of 66366280 in words is "sixty-six million, three hundred sixty-six thousand, two hundred eighty".