53500066 has 4 divisors (see below), whose sum is σ = 80250102. Its totient is φ = 26750032.

The previous prime is 53500061. The next prime is 53500081. The reversal of 53500066 is 66000535.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 52142841 + 1357225 = 7221^2 + 1165^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 53500066.

It is not an unprimeable number, because it can be changed into a prime (53500061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13375015 + ... + 13375018.

Almost surely, 2^53500066 is an apocalyptic number.

53500066 is a deficient number, since it is larger than the sum of its proper divisors (26750036).

53500066 is a wasteful number, since it uses less digits than its factorization.

53500066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26750035.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 53500066 is about 7314.3739308296. The cubic root of 53500066 is about 376.8062571179.

The spelling of 53500066 in words is "fifty-three million, five hundred thousand, sixty-six".