66391316355000 has 640 divisors, whose sum is σ = 255347982489600. Its totient is φ = 14003532288000.

The previous prime is 66391316354999. The next prime is 66391316355061. The reversal of 66391316355000 is 55361319366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 6528789916 + ... + 6528800084.

It is an arithmetic number, because the mean of its divisors is an integer number (398981222640).

Almost surely, 2^{66391316355000} is an apocalyptic number.

66391316355000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66391316355000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127673991244800).

66391316355000 is an abundant number, since it is smaller than the sum of its proper divisors (188956666134600).

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

66391316355000 is a wasteful number, since it uses less digits than its factorization.

66391316355000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15001 (or 14982 counting only the distinct ones).

The product of its (nonzero) digits is 1312200, while the sum is 48.

The spelling of 66391316355000 in words is "sixty-six trillion, three hundred ninety-one billion, three hundred sixteen million, three hundred fifty-five thousand".