66717644012226 has 24 divisors (see below), whose sum is σ = 148461784425084. Its totient is φ = 21638154814560.

The previous prime is 66717644012207. The next prime is 66717644012359. The reversal of 66717644012226 is 62221044671766.

66717644012226 is a `hidden beast` number, since 6 + 6 + 7 + 1 + 7 + 6 + 4 + 401 + 2 + 226 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 65100934305225 + 1616709707001 = 8068515^2 + 1271499^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50088320665 + ... + 50088321996.

Almost surely, 2^{66717644012226} is an apocalyptic number.

66717644012226 is an abundant number, since it is smaller than the sum of its proper divisors (81744140412858).

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

66717644012226 is a wasteful number, since it uses less digits than its factorization.

66717644012226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100176642706 (or 100176642703 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 54.

The spelling of 66717644012226 in words is "sixty-six trillion, seven hundred seventeen billion, six hundred forty-four million, twelve thousand, two hundred twenty-six".