64666110220 has 12 divisors (see below), whose sum is σ = 135798831504. Its totient is φ = 25866444080.

The previous prime is 64666110209. The next prime is 64666110251. The reversal of 64666110220 is 2201166646.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1616652736 + ... + 1616652775.

It is an arithmetic number, because the mean of its divisors is an integer number (11316569292).

Almost surely, 2^64666110220 is an apocalyptic number.

It is an amenable number.

64666110220 is an abundant number, since it is smaller than the sum of its proper divisors (71132721284).

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

64666110220 is a wasteful number, since it uses less digits than its factorization.

64666110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233305520 (or 3233305518 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

Adding to 64666110220 its reverse (2201166646), we get a palindrome (66867276866).

The spelling of 64666110220 in words is "sixty-four billion, six hundred sixty-six million, one hundred ten thousand, two hundred twenty".