66706127342207 has 4 divisors (see below), whose sum is σ = 66735167887536. Its totient is φ = 66677086796880.

The previous prime is 66706127342167. The next prime is 66706127342213. The reversal of 66706127342207 is 70224372160766.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66706127342207 - 2²⁸ = 66705858906751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66706127341207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14520269219 + ... + 14520273812.

It is an arithmetic number, because the mean of its divisors is an integer number (16683791971884).

Almost surely, 2^{66706127342207} is an apocalyptic number.

66706127342207 is a deficient number, since it is larger than the sum of its proper divisors (29040545329).

66706127342207 is a wasteful number, since it uses less digits than its factorization.

66706127342207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29040545328.

The product of its (nonzero) digits is 7112448, while the sum is 53.

The spelling of 66706127342207 in words is "sixty-six trillion, seven hundred six billion, one hundred twenty-seven million, three hundred forty-two thousand, two hundred seven".