67666880 has 56 divisors (see below), whose sum is σ = 162775392. Its totient is φ = 26790912.

The previous prime is 67666877. The next prime is 67666927. The reversal of 67666880 is 8866676.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31934 + ... + 33986.

Almost surely, 2^67666880 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 67666880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81387696).

67666880 is an abundant number, since it is smaller than the sum of its proper divisors (95108512).

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

67666880 is a wasteful number, since it uses less digits than its factorization.

67666880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2173 (or 2163 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 67666880 is about 8225.9880865462. The cubic root of 67666880 is about 407.4979085795.

The spelling of 67666880 in words is "sixty-seven million, six hundred sixty-six thousand, eight hundred eighty".