66365110301420 has 384 divisors, whose sum is σ = 170723408486400. Its totient is φ = 21166422294528.

The previous prime is 66365110301389. The next prime is 66365110301423. The reversal of 66365110301420 is 2410301156366.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (66365110301423) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 18068364704 + ... + 18068368376.

It is an arithmetic number, because the mean of its divisors is an integer number (444592209600).

Almost surely, 2^{66365110301420} 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 66365110301420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85361704243200).

66365110301420 is an abundant number, since it is smaller than the sum of its proper divisors (104358298184980).

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

66365110301420 is a wasteful number, since it uses less digits than its factorization.

66365110301420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4337 (or 4335 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

Adding to 66365110301420 its reverse (2410301156366), we get a palindrome (68775411457786).

The spelling of 66365110301420 in words is "sixty-six trillion, three hundred sixty-five billion, one hundred ten million, three hundred one thousand, four hundred twenty".