667231585813 has 4 divisors (see below), whose sum is σ = 718557092428. Its totient is φ = 615906079200.

The previous prime is 667231585807. The next prime is 667231585819. The reversal of 667231585813 is 318585132766.

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

It is an interprime number because it is at equal distance from previous prime (667231585807) and next prime (667231585819).

It can be written as a sum of positive squares in 2 ways, for example, as 117198729649 + 550032856164 = 342343^2 + 741642^2 .

It is a cyclic number.

It is not a de Polignac number, because 667231585813 - 2¹⁷ = 667231454741 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 (667231585819) 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, 25662753288 + ... + 25662753313.

It is an arithmetic number, because the mean of its divisors is an integer number (179639273107).

Almost surely, 2^667231585813 is an apocalyptic number.

It is an amenable number.

667231585813 is a deficient number, since it is larger than the sum of its proper divisors (51325506615).

667231585813 is a wasteful number, since it uses less digits than its factorization.

667231585813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51325506614.

The product of its digits is 7257600, while the sum is 55.

The spelling of 667231585813 in words is "six hundred sixty-seven billion, two hundred thirty-one million, five hundred eighty-five thousand, eight hundred thirteen".