667404343741 has 4 divisors (see below), whose sum is σ = 667408592512. Its totient is φ = 667400094972.

The previous prime is 667404343721. The next prime is 667404343777. The reversal of 667404343741 is 147343404766.

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-667404343741 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 (667404343721) 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, 1879341 + ... + 2206066.

It is an arithmetic number, because the mean of its divisors is an integer number (166852148128).

Almost surely, 2^667404343741 is an apocalyptic number.

It is an amenable number.

667404343741 is a deficient number, since it is larger than the sum of its proper divisors (4248771).

667404343741 is a wasteful number, since it uses less digits than its factorization.

667404343741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4248770.

The product of its (nonzero) digits is 4064256, while the sum is 49.

The spelling of 667404343741 in words is "six hundred sixty-seven billion, four hundred four million, three hundred forty-three thousand, seven hundred forty-one".