666738113842 has 8 divisors (see below), whose sum is σ = 1007302186800. Its totient is φ = 330970718244.

The previous prime is 666738113827. The next prime is 666738113861. The reversal of 666738113842 is 248311837666.

666738113842 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1199168992 + ... + 1199169547.

It is an arithmetic number, because the mean of its divisors is an integer number (125912773350).

Almost surely, 2^666738113842 is an apocalyptic number.

666738113842 is a deficient number, since it is larger than the sum of its proper divisors (340564072958).

666738113842 is a wasteful number, since it uses less digits than its factorization.

666738113842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398338680.

The product of its digits is 6967296, while the sum is 55.

The spelling of 666738113842 in words is "six hundred sixty-six billion, seven hundred thirty-eight million, one hundred thirteen thousand, eight hundred forty-two".