67666190670 has 192 divisors, whose sum is σ = 205027490304. Its totient is φ = 15931935360.

The previous prime is 67666190659. The next prime is 67666190701. The reversal of 67666190670 is 7609166676.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 680005 + ... + 773135.

It is an arithmetic number, because the mean of its divisors is an integer number (1067851512).

Almost surely, 2^67666190670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67666190670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102513745152).

67666190670 is an abundant number, since it is smaller than the sum of its proper divisors (137361299634).

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

67666190670 is a wasteful number, since it uses less digits than its factorization.

67666190670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93189 (or 93177 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The spelling of 67666190670 in words is "sixty-seven billion, six hundred sixty-six million, one hundred ninety thousand, six hundred seventy".