66291704 has 32 divisors (see below), whose sum is σ = 137337120. Its totient is φ = 29838336.

The previous prime is 66291691. The next prime is 66291713. The reversal of 66291704 is 40719266.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7469 + ... + 13724.

It is an arithmetic number, because the mean of its divisors is an integer number (4291785).

Almost surely, 2^66291704 is an apocalyptic number.

It is an amenable number.

66291704 is an abundant number, since it is smaller than the sum of its proper divisors (71045416).

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

66291704 is a wasteful number, since it uses less digits than its factorization.

66291704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21239 (or 21235 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 66291704 is about 8141.9717513634. The cubic root of 66291704 is about 404.7185037760.

The spelling of 66291704 in words is "sixty-six million, two hundred ninety-one thousand, seven hundred four".