66703287 has 16 divisors (see below), whose sum is σ = 101786112. Its totient is φ = 38062560.

The previous prime is 66703279. The next prime is 66703303. The reversal of 66703287 is 78230766.

It is not a de Polignac number, because 66703287 - 2³ = 66703279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66703207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16837 + ... + 20417.

It is an arithmetic number, because the mean of its divisors is an integer number (6361632).

Almost surely, 2^66703287 is an apocalyptic number.

66703287 is a deficient number, since it is larger than the sum of its proper divisors (35082825).

66703287 is a wasteful number, since it uses less digits than its factorization.

66703287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4478.

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 66703287 is about 8167.2080296757. The cubic root of 66703287 is about 405.5543635363.

The spelling of 66703287 in words is "sixty-six million, seven hundred three thousand, two hundred eighty-seven".