66379784398 has 8 divisors (see below), whose sum is σ = 99865136592. Its totient is φ = 33091405536.

The previous prime is 66379784353. The next prime is 66379784477. The reversal of 66379784398 is 89348797366.

66379784398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49242490 + ... + 49243837.

It is an arithmetic number, because the mean of its divisors is an integer number (12483142074).

Almost surely, 2^66379784398 is an apocalyptic number.

66379784398 is a deficient number, since it is larger than the sum of its proper divisors (33485352194).

66379784398 is a wasteful number, since it uses less digits than its factorization.

66379784398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98486666.

The product of its digits is 329204736, while the sum is 70.

The spelling of 66379784398 in words is "sixty-six billion, three hundred seventy-nine million, seven hundred eighty-four thousand, three hundred ninety-eight".