66605053 has 8 divisors (see below), whose sum is σ = 67511808. Its totient is φ = 65703504.

The previous prime is 66605027. The next prime is 66605057. The reversal of 66605053 is 35050666.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66605053 - 2²¹ = 64507901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66605057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29076 + ... + 31282.

It is an arithmetic number, because the mean of its divisors is an integer number (8438976).

Almost surely, 2^66605053 is an apocalyptic number.

It is an amenable number.

66605053 is a deficient number, since it is larger than the sum of its proper divisors (906755).

66605053 is a wasteful number, since it uses less digits than its factorization.

66605053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2603.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 66605053 is about 8161.1918859931. The cubic root of 66605053 is about 405.3551789471.

The spelling of 66605053 in words is "sixty-six million, six hundred five thousand, fifty-three".