66217543202 has 8 divisors (see below), whose sum is σ = 99327452700. Its totient is φ = 33108392304.

The previous prime is 66217543181. The next prime is 66217543229. The reversal of 66217543202 is 20234571266.

It can be written as a sum of positive squares in 2 ways, for example, as 65786607121 + 430936081 = 256489^2 + 20759^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 150824 + ... + 393932.

Almost surely, 2^66217543202 is an apocalyptic number.

66217543202 is a deficient number, since it is larger than the sum of its proper divisors (33109909498).

66217543202 is a wasteful number, since it uses less digits than its factorization.

66217543202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379300.

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 66217543202 in words is "sixty-six billion, two hundred seventeen million, five hundred forty-three thousand, two hundred two".