66476665419 has 8 divisors (see below), whose sum is σ = 88653747600. Its totient is φ = 44308680096.

The previous prime is 66476665417. The next prime is 66476665427. The reversal of 66476665419 is 91456667466.

It is a happy number.

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

It is not a de Polignac number, because 66476665419 - 2¹ = 66476665417 is a prime.

It is a super-2 number, since 2×66476665419² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66476665417) 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, 2257144 + ... + 2286405.

It is an arithmetic number, because the mean of its divisors is an integer number (11081718450).

Almost surely, 2^66476665419 is an apocalyptic number.

66476665419 is a deficient number, since it is larger than the sum of its proper divisors (22177082181).

66476665419 is a wasteful number, since it uses less digits than its factorization.

66476665419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4548429.

The product of its digits is 39191040, while the sum is 60.

The spelling of 66476665419 in words is "sixty-six billion, four hundred seventy-six million, six hundred sixty-five thousand, four hundred nineteen".