66455560426 has 8 divisors (see below), whose sum is σ = 99812970180. Its totient is φ = 33184570368.

The previous prime is 66455560403. The next prime is 66455560427. The reversal of 66455560426 is 62406555466.

It can be written as a sum of positive squares in 2 ways, for example, as 61001590225 + 5453970201 = 246985^2 + 73851^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 66455560426.

It is not an unprimeable number, because it can be changed into a prime (66455560427) 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, 21603001 + ... + 21606076.

Almost surely, 2^66455560426 is an apocalyptic number.

66455560426 is a deficient number, since it is larger than the sum of its proper divisors (33357409754).

66455560426 is a wasteful number, since it uses less digits than its factorization.

66455560426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43209848.

The product of its (nonzero) digits is 5184000, while the sum is 49.

The spelling of 66455560426 in words is "sixty-six billion, four hundred fifty-five million, five hundred sixty thousand, four hundred twenty-six".