667206924641 has 4 divisors (see below), whose sum is σ = 667209066900. Its totient is φ = 667204782384.

The previous prime is 667206924623. The next prime is 667206924653. The reversal of 667206924641 is 146429602766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 544791610000 + 122415314641 = 738100^2 + 349879^2 .

It is a cyclic number.

It is not a de Polignac number, because 667206924641 - 2¹⁴ = 667206908257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (667206944641) 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, 503786 + ... + 1260243.

It is an arithmetic number, because the mean of its divisors is an integer number (166802266725).

Almost surely, 2^667206924641 is an apocalyptic number.

It is an amenable number.

667206924641 is a deficient number, since it is larger than the sum of its proper divisors (2142259).

667206924641 is a wasteful number, since it uses less digits than its factorization.

667206924641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142258.

The product of its (nonzero) digits is 5225472, while the sum is 53.

The spelling of 667206924641 in words is "six hundred sixty-seven billion, two hundred six million, nine hundred twenty-four thousand, six hundred forty-one".