66201673628040 has 128 divisors (see below), whose sum is σ = 201438599120640. Its totient is φ = 17402177396736.

The previous prime is 66201673627993. The next prime is 66201673628063. The reversal of 66201673628040 is 4082637610266.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13499824 + ... + 17738336.

It is an arithmetic number, because the mean of its divisors is an integer number (1573739055630).

Almost surely, 2^{66201673628040} is an apocalyptic number.

66201673628040 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 66201673628040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100719299560320).

66201673628040 is an abundant number, since it is smaller than the sum of its proper divisors (135236925492600).

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

66201673628040 is a wasteful number, since it uses less digits than its factorization.

66201673628040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4240383 (or 4240379 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 51.

The spelling of 66201673628040 in words is "sixty-six trillion, two hundred one billion, six hundred seventy-three million, six hundred twenty-eight thousand, forty".