66420500423 has 8 divisors (see below), whose sum is σ = 66606190560. Its totient is φ = 66235070880.

The previous prime is 66420500413. The next prime is 66420500431. The reversal of 66420500423 is 32400502466.

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 66420500423 - 2²² = 66416306119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66420500423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66420500413) 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, 451013 + ... + 579873.

It is an arithmetic number, because the mean of its divisors is an integer number (8325773820).

Almost surely, 2^66420500423 is an apocalyptic number.

66420500423 is a deficient number, since it is larger than the sum of its proper divisors (185690137).

66420500423 is a wasteful number, since it uses less digits than its factorization.

66420500423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130297.

The product of its (nonzero) digits is 34560, while the sum is 32.

The spelling of 66420500423 in words is "sixty-six billion, four hundred twenty million, five hundred thousand, four hundred twenty-three".