67620505661670 has 256 divisors, whose sum is σ = 188051621345280. Its totient is φ = 15432733814784.

The previous prime is 67620505661633. The next prime is 67620505661701. The reversal of 67620505661670 is 7616650502676.

It is a self number, because there is not a number n which added to its sum of digits gives 67620505661670.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 38602186 + ... + 40315874.

It is an arithmetic number, because the mean of its divisors is an integer number (734576645880).

Almost surely, 2^{67620505661670} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67620505661670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94025810672640).

67620505661670 is an abundant number, since it is smaller than the sum of its proper divisors (120431115683610).

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

67620505661670 is a wasteful number, since it uses less digits than its factorization.

67620505661670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713871.

The product of its (nonzero) digits is 19051200, while the sum is 57.

The spelling of 67620505661670 in words is "sixty-seven trillion, six hundred twenty billion, five hundred five million, six hundred sixty-one thousand, six hundred seventy".