67988213766 has 48 divisors (see below), whose sum is σ = 165883281408. Its totient is φ = 19937890800.

The previous prime is 67988213737. The next prime is 67988213789. The reversal of 67988213766 is 66731288976.

It is a super-2 number, since 2×67988213766² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5532166 + ... + 5544441.

It is an arithmetic number, because the mean of its divisors is an integer number (3455901696).

Almost surely, 2^67988213766 is an apocalyptic number.

67988213766 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

67988213766 is an abundant number, since it is smaller than the sum of its proper divisors (97895067642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67988213766 is a wasteful number, since it uses less digits than its factorization.

67988213766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11076657 (or 11076654 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 63.

The spelling of 67988213766 in words is "sixty-seven billion, nine hundred eighty-eight million, two hundred thirteen thousand, seven hundred sixty-six".