66363356620 has 96 divisors (see below), whose sum is σ = 163378736640. Its totient is φ = 22373514240.

The previous prime is 66363356597. The next prime is 66363356627. The reversal of 66363356620 is 2665336366.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66363356627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118161 + ... + 382999.

It is an arithmetic number, because the mean of its divisors is an integer number (1701861840).

Almost surely, 2^66363356620 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 66363356620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81689368320).

66363356620 is an abundant number, since it is smaller than the sum of its proper divisors (97015380020).

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

66363356620 is a wasteful number, since it uses less digits than its factorization.

66363356620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264943 (or 264941 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 46.

The spelling of 66363356620 in words is "sixty-six billion, three hundred sixty-three million, three hundred fifty-six thousand, six hundred twenty".