67666488 has 64 divisors (see below), whose sum is σ = 175113120. Its totient is φ = 21772800.

The previous prime is 67666463. The next prime is 67666493. The reversal of 67666488 is 88466676.

Its product of digits (2322432) is a multiple of the sum of its prime factors (648).

It is a self number, because there is not a number n which added to its sum of digits gives 67666488.

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 15 ways as a sum of consecutive naturals, for example, 160518 + ... + 160938.

Almost surely, 2^67666488 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 67666488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87556560).

67666488 is an abundant number, since it is smaller than the sum of its proper divisors (107446632).

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

67666488 is a wasteful number, since it uses less digits than its factorization.

67666488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648 (or 644 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 51.

The square root of 67666488 is about 8225.9642595868. The cubic root of 67666488 is about 407.4971216879.

The spelling of 67666488 in words is "sixty-seven million, six hundred sixty-six thousand, four hundred eighty-eight".