66704768 has 32 divisors (see below), whose sum is σ = 143114160. Its totient is φ = 30786048.

The previous prime is 66704749. The next prime is 66704773. The reversal of 66704768 is 86740766.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18380 + ... + 21707.

Almost surely, 2^66704768 is an apocalyptic number.

It is an amenable number.

66704768 is an abundant number, since it is smaller than the sum of its proper divisors (76409392).

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

66704768 is a wasteful number, since it uses less digits than its factorization.

66704768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40114 (or 40102 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 66704768 is about 8167.2986966316. The cubic root of 66704768 is about 405.5573649954.

The spelling of 66704768 in words is "sixty-six million, seven hundred four thousand, seven hundred sixty-eight".