66443006253 has 8 divisors (see below), whose sum is σ = 95405342368. Its totient is φ = 40888003824.

The previous prime is 66443006249. The next prime is 66443006269. The reversal of 66443006253 is 35260034466.

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

It is not a de Polignac number, because 66443006253 - 2² = 66443006249 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1703666827 = 66443006253 / (6 + 6 + 4 + 4 + 3 + 0 + 0 + 6 + 2 + 5 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66443006243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 851833375 + ... + 851833452.

It is an arithmetic number, because the mean of its divisors is an integer number (11925667796).

Almost surely, 2^66443006253 is an apocalyptic number.

It is an amenable number.

66443006253 is a deficient number, since it is larger than the sum of its proper divisors (28962336115).

66443006253 is a wasteful number, since it uses less digits than its factorization.

66443006253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1703666843.

The product of its (nonzero) digits is 311040, while the sum is 39.

The spelling of 66443006253 in words is "sixty-six billion, four hundred forty-three million, six thousand, two hundred fifty-three".