667888889998 has 64 divisors (see below), whose sum is σ = 1157599745280. Its totient is φ = 285818803200.

The previous prime is 667888889953. The next prime is 667888889999. The reversal of 667888889998 is 899988888766.

It is a happy number.

It is a super-3 number, since 3×667888889998³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667888889999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79953790 + ... + 79962142.

It is an arithmetic number, because the mean of its divisors is an integer number (18087496020).

Almost surely, 2^667888889998 is an apocalyptic number.

667888889998 is a deficient number, since it is larger than the sum of its proper divisors (489710855282).

667888889998 is a wasteful number, since it uses less digits than its factorization.

667888889998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9553.

The product of its digits is 48157949952, while the sum is 94.

The spelling of 667888889998 in words is "six hundred sixty-seven billion, eight hundred eighty-eight million, eight hundred eighty-nine thousand, nine hundred ninety-eight".