66544015106253 has 8 divisors (see below), whose sum is σ = 88725395907648. Its totient is φ = 44362655521184.

The previous prime is 66544015106171. The next prime is 66544015106263. The reversal of 66544015106253 is 35260151044566.

It is a happy number.

66544015106253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 66544015106253 - 2⁹ = 66544015105741 is a prime.

It is a super-2 number, since 2×66544015106253² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66544015106263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4721401 + ... + 12465137.

It is an arithmetic number, because the mean of its divisors is an integer number (11090674488456).

Almost surely, 2^{66544015106253} is an apocalyptic number.

It is an amenable number.

66544015106253 is a deficient number, since it is larger than the sum of its proper divisors (22181380801395).

66544015106253 is a wasteful number, since it uses less digits than its factorization.

66544015106253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10608163.

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 66544015106253 in words is "sixty-six trillion, five hundred forty-four billion, fifteen million, one hundred six thousand, two hundred fifty-three".