667402305422641 has 4 divisors (see below), whose sum is σ = 667402360284400. Its totient is φ = 667402250560884.

The previous prime is 667402305422621. The next prime is 667402305422659. The reversal of 667402305422641 is 146224503204766.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 667402305422641 - 2¹¹ = 667402305420593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667402305422621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118011 + ... + 36535168.

It is an arithmetic number, because the mean of its divisors is an integer number (166850590071100).

Almost surely, 2^{667402305422641} is an apocalyptic number.

It is an amenable number.

667402305422641 is a deficient number, since it is larger than the sum of its proper divisors (54861759).

667402305422641 is a wasteful number, since it uses less digits than its factorization.

667402305422641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54861758.

The product of its (nonzero) digits is 11612160, while the sum is 52.

The spelling of 667402305422641 in words is "six hundred sixty-seven trillion, four hundred two billion, three hundred five million, four hundred twenty-two thousand, six hundred forty-one".