66704856 has 32 divisors (see below), whose sum is σ = 167151600. Its totient is φ = 22183040.

The previous prime is 66704837. The next prime is 66704857. The reversal of 66704856 is 65840766.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66704857) by changing a digit.

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, 8050 + ... + 14078.

Almost surely, 2^66704856 is an apocalyptic number.

It is an amenable number.

66704856 is an abundant number, since it is smaller than the sum of its proper divisors (100446744).

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

66704856 is a wasteful number, since it uses less digits than its factorization.

66704856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6499 (or 6495 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 66704856 is about 8167.3040839680. The cubic root of 66704856 is about 405.5575433387.

The spelling of 66704856 in words is "sixty-six million, seven hundred four thousand, eight hundred fifty-six".