66845704 has 8 divisors (see below), whose sum is σ = 125335710. Its totient is φ = 33422848.

The previous prime is 66845689. The next prime is 66845711. The reversal of 66845704 is 40754866.

It can be written as a sum of positive squares in only one way, i.e., 51868804 + 14976900 = 7202^2 + 3870^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a pancake number, because a pancake can be divided into 66845704 parts by 11562 straight cuts.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4177849 + ... + 4177864.

Almost surely, 2^66845704 is an apocalyptic number.

It is an amenable number.

66845704 is a deficient number, since it is larger than the sum of its proper divisors (58490006).

66845704 is a wasteful number, since it uses less digits than its factorization.

66845704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8355719 (or 8355715 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 66845704 is about 8175.9222109802. The cubic root of 66845704 is about 405.8427889956.

The spelling of 66845704 in words is "sixty-six million, eight hundred forty-five thousand, seven hundred four".