66563204 has 6 divisors (see below), whose sum is σ = 116485614. Its totient is φ = 33281600.

The previous prime is 66563179. The next prime is 66563221. The reversal of 66563204 is 40236566.

It can be written as a sum of positive squares in only one way, i.e., 48330304 + 18232900 = 6952^2 + 4270^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8320397 + ... + 8320404.

It is an arithmetic number, because the mean of its divisors is an integer number (19414269).

Almost surely, 2^66563204 is an apocalyptic number.

It is an amenable number.

66563204 is a deficient number, since it is larger than the sum of its proper divisors (49922410).

66563204 is a wasteful number, since it uses less digits than its factorization.

66563204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16640805 (or 16640803 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 66563204 is about 8158.6275806658. The cubic root of 66563204 is about 405.2702641536.

The spelling of 66563204 in words is "sixty-six million, five hundred sixty-three thousand, two hundred four".