66706733407 has 4 divisors (see below), whose sum is σ = 67367196216. Its totient is φ = 66046270600.

The previous prime is 66706733371. The next prime is 66706733413. The reversal of 66706733407 is 70433760766.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66706733407 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 (66706773407) 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, 330231253 + ... + 330231454.

It is an arithmetic number, because the mean of its divisors is an integer number (16841799054).

Almost surely, 2^66706733407 is an apocalyptic number.

66706733407 is a deficient number, since it is larger than the sum of its proper divisors (660462809).

66706733407 is a wasteful number, since it uses less digits than its factorization.

66706733407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660462808.

The product of its (nonzero) digits is 2667168, while the sum is 49.

The spelling of 66706733407 in words is "sixty-six billion, seven hundred six million, seven hundred thirty-three thousand, four hundred seven".