66620603301344 has 96 divisors (see below), whose sum is σ = 140072315312160. Its totient is φ = 31098459340800.

The previous prime is 66620603301313. The next prime is 66620603301367. The reversal of 66620603301344 is 44310330602666.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66620603301295 and 66620603301304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51782024 + ... + 53052984.

It is an arithmetic number, because the mean of its divisors is an integer number (1459086617835).

Almost surely, 2^{66620603301344} 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 66620603301344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70036157656080).

66620603301344 is an abundant number, since it is smaller than the sum of its proper divisors (73451712010816).

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

66620603301344 is a wasteful number, since it uses less digits than its factorization.

66620603301344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272244 (or 1272236 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 44.

The spelling of 66620603301344 in words is "sixty-six trillion, six hundred twenty billion, six hundred three million, three hundred one thousand, three hundred forty-four".