66240001619 has 8 divisors (see below), whose sum is σ = 72294149808. Its totient is φ = 60191241760.

The previous prime is 66240001613. The next prime is 66240001697. The reversal of 66240001619 is 91610004266.

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 66240001619 - 2²⁸ = 65971566163 is a prime.

It is a super-2 number, since 2×66240001619² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66240001613) 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, 1321352 + ... + 1370565.

It is an arithmetic number, because the mean of its divisors is an integer number (9036768726).

Almost surely, 2^66240001619 is an apocalyptic number.

66240001619 is a deficient number, since it is larger than the sum of its proper divisors (6054148189).

66240001619 is a wasteful number, since it uses less digits than its factorization.

66240001619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694165.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 66240001619 in words is "sixty-six billion, two hundred forty million, one thousand, six hundred nineteen".