667076770671 has 4 divisors (see below), whose sum is σ = 889435694232. Its totient is φ = 444717847112.

The previous prime is 667076770667. The next prime is 667076770747. The reversal of 667076770671 is 176077670766.

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 667076770671 - 2² = 667076770667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667076770621) 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, 111179461776 + ... + 111179461781.

It is an arithmetic number, because the mean of its divisors is an integer number (222358923558).

Almost surely, 2^667076770671 is an apocalyptic number.

667076770671 is a deficient number, since it is larger than the sum of its proper divisors (222358923561).

667076770671 is a wasteful number, since it uses less digits than its factorization.

667076770671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222358923560.

The product of its (nonzero) digits is 21781872, while the sum is 60.

The spelling of 667076770671 in words is "six hundred sixty-seven billion, seventy-six million, seven hundred seventy thousand, six hundred seventy-one".