667216377742 has 16 divisors (see below), whose sum is σ = 1005675363792. Its totient is φ = 331994807680.

The previous prime is 667216377691. The next prime is 667216377769. The reversal of 667216377742 is 247773612766.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511384 + ... + 1263307.

It is an arithmetic number, because the mean of its divisors is an integer number (62854710237).

Almost surely, 2^667216377742 is an apocalyptic number.

667216377742 is a deficient number, since it is larger than the sum of its proper divisors (338458986050).

667216377742 is a wasteful number, since it uses less digits than its factorization.

667216377742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1775603.

The product of its digits is 24893568, while the sum is 58.

The spelling of 667216377742 in words is "six hundred sixty-seven billion, two hundred sixteen million, three hundred seventy-seven thousand, seven hundred forty-two".