66553064 has 8 divisors (see below), whose sum is σ = 124787010. Its totient is φ = 33276528.

The previous prime is 66553051. The next prime is 66553073. The reversal of 66553064 is 46035566.

It can be written as a sum of positive squares in only one way, i.e., 66552964 + 100 = 8158^2 + 10^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4159559 + ... + 4159574.

Almost surely, 2^66553064 is an apocalyptic number.

It is an amenable number.

66553064 is a deficient number, since it is larger than the sum of its proper divisors (58233946).

66553064 is a wasteful number, since it uses less digits than its factorization.

66553064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8319139 (or 8319135 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 66553064 is about 8158.0061289509. The cubic root of 66553064 is about 405.2496839685.

The spelling of 66553064 in words is "sixty-six million, five hundred fifty-three thousand, sixty-four".