66651353 has 4 divisors (see below), whose sum is σ = 66676020. Its totient is φ = 66626688.

The previous prime is 66651341. The next prime is 66651371. The reversal of 66651353 is 35315666.

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

It can be written as a sum of positive squares in 2 ways, for example, as 59105344 + 7546009 = 7688^2 + 2747^2 .

It is a cyclic number.

It is not a de Polignac number, because 66651353 - 2⁴ = 66651337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66651323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7700 + ... + 13877.

It is an arithmetic number, because the mean of its divisors is an integer number (16669005).

Almost surely, 2^66651353 is an apocalyptic number.

It is an amenable number.

66651353 is a deficient number, since it is larger than the sum of its proper divisors (24667).

66651353 is a wasteful number, since it uses less digits than its factorization.

66651353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24666.

The product of its digits is 48600, while the sum is 35.

The square root of 66651353 is about 8164.0279886830. The cubic root of 66651353 is about 405.4490837227.

The spelling of 66651353 in words is "sixty-six million, six hundred fifty-one thousand, three hundred fifty-three".