66671107077 has 4 divisors (see below), whose sum is σ = 88894809440. Its totient is φ = 44447404716.

The previous prime is 66671107051. The next prime is 66671107079. The reversal of 66671107077 is 77070117666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66671107077 - 2⁷ = 66671106949 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 (66671107079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11111851177 + ... + 11111851182.

It is an arithmetic number, because the mean of its divisors is an integer number (22223702360).

Almost surely, 2^66671107077 is an apocalyptic number.

It is an amenable number.

66671107077 is a deficient number, since it is larger than the sum of its proper divisors (22223702363).

66671107077 is a wasteful number, since it uses less digits than its factorization.

66671107077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22223702362.

The product of its (nonzero) digits is 518616, while the sum is 48.

The spelling of 66671107077 in words is "sixty-six billion, six hundred seventy-one million, one hundred seven thousand, seventy-seven".