66664636442 has 8 divisors (see below), whose sum is σ = 104344648416. Its totient is φ = 31883086972.

The previous prime is 66664636429. The next prime is 66664636457. The reversal of 66664636442 is 24463646666.

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, 724615568 + ... + 724615659.

It is an arithmetic number, because the mean of its divisors is an integer number (13043081052).

Almost surely, 2^66664636442 is an apocalyptic number.

66664636442 is a deficient number, since it is larger than the sum of its proper divisors (37680011974).

66664636442 is a wasteful number, since it uses less digits than its factorization.

66664636442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1449231252.

The product of its digits is 17915904, while the sum is 53.

The spelling of 66664636442 in words is "sixty-six billion, six hundred sixty-four million, six hundred thirty-six thousand, four hundred forty-two".