66100143545666 has 8 divisors (see below), whose sum is σ = 99190900682940. Its totient is φ = 33036509984688.

The previous prime is 66100143545641. The next prime is 66100143545719. The reversal of 66100143545666 is 66654534100166.

It can be written as a sum of positive squares in 2 ways, for example, as 45267719840641 + 20832423705025 = 6728129^2 + 4564255^2 .

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, 6780887981 + ... + 6780897728.

Almost surely, 2^{66100143545666} is an apocalyptic number.

66100143545666 is a deficient number, since it is larger than the sum of its proper divisors (33090757137274).

66100143545666 is a wasteful number, since it uses less digits than its factorization.

66100143545666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13561788148.

The product of its (nonzero) digits is 9331200, while the sum is 53.

The spelling of 66100143545666 in words is "sixty-six trillion, one hundred billion, one hundred forty-three million, five hundred forty-five thousand, six hundred sixty-six".