66053645 has 8 divisors (see below), whose sum is σ = 90587904. Its totient is φ = 45293904.

The previous prime is 66053639. The next prime is 66053651. The reversal of 66053645 is 54635066.

It is an interprime number because it is at equal distance from previous prime (66053639) and next prime (66053651).

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 66053645 - 2⁴ = 66053629 is a prime.

It is a super-3 number, since 3×66053645³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 1887247 = 66053645 / (6 + 6 + 0 + 5 + 3 + 6 + 4 + 5).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 943589 + ... + 943658.

It is an arithmetic number, because the mean of its divisors is an integer number (11323488).

Almost surely, 2^66053645 is an apocalyptic number.

It is an amenable number.

66053645 is a deficient number, since it is larger than the sum of its proper divisors (24534259).

66053645 is a wasteful number, since it uses less digits than its factorization.

66053645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887259.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 66053645 is about 8127.3393555333. The cubic root of 66053645 is about 404.2334634819.

The spelling of 66053645 in words is "sixty-six million, fifty-three thousand, six hundred forty-five".