66871030 has 32 divisors (see below), whose sum is σ = 131569920. Its totient is φ = 24360960.

The previous prime is 66871019. The next prime is 66871033. The reversal of 66871030 is 3017866.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 66870983 and 66871001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66871033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1075 + ... + 11614.

It is an arithmetic number, because the mean of its divisors is an integer number (4111560).

Almost surely, 2^66871030 is an apocalyptic number.

66871030 is a deficient number, since it is larger than the sum of its proper divisors (64698890).

66871030 is a wasteful number, since it uses less digits than its factorization.

66871030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12744.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 66871030 is about 8177.4708804128. The cubic root of 66871030 is about 405.8940367501.

Adding to 66871030 its reverse (3017866), we get a palindrome (69888896).

The spelling of 66871030 in words is "sixty-six million, eight hundred seventy-one thousand, thirty".