667881039998 has 8 divisors (see below), whose sum is σ = 1001827788192. Its totient is φ = 333938443936.

The previous prime is 667881039997. The next prime is 667881040103. The reversal of 667881039998 is 899930188766.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667881039997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 598715 + ... + 1301622.

It is an arithmetic number, because the mean of its divisors is an integer number (125228473524).

Almost surely, 2^667881039998 is an apocalyptic number.

667881039998 is a deficient number, since it is larger than the sum of its proper divisors (333946748194).

667881039998 is a wasteful number, since it uses less digits than its factorization.

667881039998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076066.

The product of its (nonzero) digits is 282175488, while the sum is 74.

The spelling of 667881039998 in words is "six hundred sixty-seven billion, eight hundred eighty-one million, thirty-nine thousand, nine hundred ninety-eight".