66505108 has 6 divisors (see below), whose sum is σ = 116383946. Its totient is φ = 33252552.

The previous prime is 66505099. The next prime is 66505147. The reversal of 66505108 is 80150566.

It can be written as a sum of positive squares in only one way, i.e., 54199044 + 12306064 = 7362^2 + 3508^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66505108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8313135 + ... + 8313142.

Almost surely, 2^66505108 is an apocalyptic number.

It is an amenable number.

66505108 is a deficient number, since it is larger than the sum of its proper divisors (49878838).

66505108 is a wasteful number, since it uses less digits than its factorization.

66505108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16626281 (or 16626279 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 66505108 is about 8155.0664007107. The cubic root of 66505108 is about 405.1523239452.

The spelling of 66505108 in words is "sixty-six million, five hundred five thousand, one hundred eight".