67105042656 has 96 divisors (see below), whose sum is σ = 178107164928. Its totient is φ = 22121241600.

The previous prime is 67105042639. The next prime is 67105042699. The reversal of 67105042656 is 65624050176.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3280396 + ... + 3300788.

It is an arithmetic number, because the mean of its divisors is an integer number (1855282968).

Almost surely, 2^67105042656 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 67105042656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89053582464).

67105042656 is an abundant number, since it is smaller than the sum of its proper divisors (111002122272).

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

67105042656 is a wasteful number, since it uses less digits than its factorization.

67105042656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20784 (or 20776 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 67105042656 in words is "sixty-seven billion, one hundred five million, forty-two thousand, six hundred fifty-six".