667661341 has 4 divisors (see below), whose sum is σ = 672464800. Its totient is φ = 662857884.

The previous prime is 667661327. The next prime is 667661359. The reversal of 667661341 is 143166766.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667661341 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667661294 and 667661303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667661381) 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, 2401521 + ... + 2401798.

It is an arithmetic number, because the mean of its divisors is an integer number (168116200).

Almost surely, 2^667661341 is an apocalyptic number.

It is an amenable number.

667661341 is a deficient number, since it is larger than the sum of its proper divisors (4803459).

667661341 is a wasteful number, since it uses less digits than its factorization.

667661341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4803458.

The product of its digits is 108864, while the sum is 40.

The square root of 667661341 is about 25839.1435810090. The cubic root of 667661341 is about 874.0147128733.

The spelling of 667661341 in words is "six hundred sixty-seven million, six hundred sixty-one thousand, three hundred forty-one".