66120053 has 4 divisors (see below), whose sum is σ = 66167628. Its totient is φ = 66072480.

The previous prime is 66120017. The next prime is 66120059. The reversal of 66120053 is 35002166.

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 27952369 + 38167684 = 5287^2 + 6178^2 .

It is a cyclic number.

It is not a de Polignac number, because 66120053 - 2¹⁰ = 66119029 is a prime.

It is a super-2 number, since 2×66120053² = 8743722817445618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66120059) 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, 21638 + ... + 24503.

It is an arithmetic number, because the mean of its divisors is an integer number (16541907).

Almost surely, 2^66120053 is an apocalyptic number.

It is an amenable number.

66120053 is a deficient number, since it is larger than the sum of its proper divisors (47575).

66120053 is a wasteful number, since it uses less digits than its factorization.

66120053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47574.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 66120053 is about 8131.4237990650. The cubic root of 66120053 is about 404.3688854547.

The spelling of 66120053 in words is "sixty-six million, one hundred twenty thousand, fifty-three".