667343666741 has 4 divisors (see below), whose sum is σ = 667347483552. Its totient is φ = 667339849932.

The previous prime is 667343666659. The next prime is 667343666779. The reversal of 667343666741 is 147666343766.

It is a happy number.

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 not a de Polignac number, because 667343666741 - 2¹⁰ = 667343665717 is a prime.

It is a super-2 number, since 2×667343666741² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667343666641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1632881 + ... + 2000246.

It is an arithmetic number, because the mean of its divisors is an integer number (166836870888).

Almost surely, 2^667343666741 is an apocalyptic number.

It is an amenable number.

667343666741 is a deficient number, since it is larger than the sum of its proper divisors (3816811).

667343666741 is a wasteful number, since it uses less digits than its factorization.

667343666741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3816810.

The product of its digits is 54867456, while the sum is 59.

The spelling of 667343666741 in words is "six hundred sixty-seven billion, three hundred forty-three million, six hundred sixty-six thousand, seven hundred forty-one".