667820158741 has 4 divisors (see below), whose sum is σ = 668234184012. Its totient is φ = 667406133472.

The previous prime is 667820158729. The next prime is 667820158813. The reversal of 667820158741 is 147851028766.

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

It can be written as a sum of positive squares in 2 ways, for example, as 299158678116 + 368661480625 = 546954^2 + 607175^2 .

It is a cyclic number.

It is not a de Polignac number, because 667820158741 - 2²³ = 667811770133 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 (667820158441) 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, 207010216 + ... + 207013441.

It is an arithmetic number, because the mean of its divisors is an integer number (167058546003).

Almost surely, 2^667820158741 is an apocalyptic number.

It is an amenable number.

667820158741 is a deficient number, since it is larger than the sum of its proper divisors (414025271).

667820158741 is a wasteful number, since it uses less digits than its factorization.

667820158741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414025270.

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 667820158741 in words is "six hundred sixty-seven billion, eight hundred twenty million, one hundred fifty-eight thousand, seven hundred forty-one".