67687697376 has 144 divisors (see below), whose sum is σ = 208004430816. Its totient is φ = 20755565568.

The previous prime is 67687697339. The next prime is 67687697377. The reversal of 67687697376 is 67379678676.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67687697377) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1066141 + ... + 1127843.

It is an arithmetic number, because the mean of its divisors is an integer number (1444475214).

Almost surely, 2^67687697376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67687697376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104002215408).

67687697376 is an abundant number, since it is smaller than the sum of its proper divisors (140316733440).

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

67687697376 is a wasteful number, since it uses less digits than its factorization.

67687697376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62025 (or 62014 counting only the distinct ones).

The product of its digits is 672126336, while the sum is 72.

The spelling of 67687697376 in words is "sixty-seven billion, six hundred eighty-seven million, six hundred ninety-seven thousand, three hundred seventy-six".