67808916 has 72 divisors (see below), whose sum is σ = 200700864. Its totient is φ = 18898560.

The previous prime is 67808887. The next prime is 67808933. The reversal of 67808916 is 61980876.

It is a happy number.

It is a super-3 number, since 3×67808916³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7051 + ... + 13613.

It is an arithmetic number, because the mean of its divisors is an integer number (2787512).

Almost surely, 2^67808916 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 67808916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100350432).

67808916 is an abundant number, since it is smaller than the sum of its proper divisors (132891948).

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

67808916 is a wasteful number, since it uses less digits than its factorization.

67808916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6621 (or 6616 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 67808916 is about 8234.6169309811. The cubic root of 67808916 is about 407.7828284838.

The spelling of 67808916 in words is "sixty-seven million, eight hundred eight thousand, nine hundred sixteen".