66830787 has 12 divisors (see below), whose sum is σ = 96617560. Its totient is φ = 44515008.

The previous prime is 66830773. The next prime is 66830789. The reversal of 66830787 is 78703866.

It is not a de Polignac number, because 66830787 - 2¹¹ = 66828739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66830789) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10908 + ... + 15894.

Almost surely, 2^66830787 is an apocalyptic number.

66830787 is a deficient number, since it is larger than the sum of its proper divisors (29786773).

66830787 is a wasteful number, since it uses less digits than its factorization.

66830787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6482 (or 6479 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 66830787 is about 8175.0099082509. The cubic root of 66830787 is about 405.8125980389.

The spelling of 66830787 in words is "sixty-six million, eight hundred thirty thousand, seven hundred eighty-seven".