66484287 has 32 divisors (see below), whose sum is σ = 104256000. Its totient is φ = 41873112.

The previous prime is 66484261. The next prime is 66484291. The reversal of 66484287 is 78248466.

It is a de Polignac number, because none of the positive numbers 2^k-66484287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66484217) 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, 185014 + ... + 185372.

It is an arithmetic number, because the mean of its divisors is an integer number (3258000).

Almost surely, 2^66484287 is an apocalyptic number.

66484287 is a deficient number, since it is larger than the sum of its proper divisors (37771713).

66484287 is an equidigital number, since it uses as much as digits as its factorization.

66484287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 381 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 66484287 is about 8153.7897323882. The cubic root of 66484287 is about 405.1100386868.

The spelling of 66484287 in words is "sixty-six million, four hundred eighty-four thousand, two hundred eighty-seven".