667162385 has 4 divisors (see below), whose sum is σ = 800594868. Its totient is φ = 533729904.

The previous prime is 667162381. The next prime is 667162393. The reversal of 667162385 is 583261766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 583261766 = 2 ⋅291630883.

It can be written as a sum of positive squares in 2 ways, for example, as 327718609 + 339443776 = 18103^2 + 18424^2 .

It is a cyclic number.

It is not a de Polignac number, because 667162385 - 2² = 667162381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667162381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66716234 + ... + 66716243.

It is an arithmetic number, because the mean of its divisors is an integer number (200148717).

Almost surely, 2^667162385 is an apocalyptic number.

It is an amenable number.

667162385 is a deficient number, since it is larger than the sum of its proper divisors (133432483).

667162385 is a wasteful number, since it uses less digits than its factorization.

667162385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133432482.

The product of its digits is 362880, while the sum is 44.

The square root of 667162385 is about 25829.4867351250. The cubic root of 667162385 is about 873.7969360168.

The spelling of 667162385 in words is "six hundred sixty-seven million, one hundred sixty-two thousand, three hundred eighty-five".