667370363414221 has 16 divisors (see below), whose sum is σ = 687142041289344. Its totient is φ = 647690021377344.

The previous prime is 667370363414201. The next prime is 667370363414281. The reversal of 667370363414221 is 122414363073766.

It is a cyclic number.

It is not a de Polignac number, because 667370363414221 - 2⁵ = 667370363414189 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 (667370363414201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1529244576 + ... + 1529680918.

It is an arithmetic number, because the mean of its divisors is an integer number (42946377580584).

Almost surely, 2^{667370363414221} is an apocalyptic number.

It is an amenable number.

667370363414221 is a deficient number, since it is larger than the sum of its proper divisors (19771677875123).

667370363414221 is a wasteful number, since it uses less digits than its factorization.

667370363414221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540900.

The product of its (nonzero) digits is 18289152, while the sum is 55.

The spelling of 667370363414221 in words is "six hundred sixty-seven trillion, three hundred seventy billion, three hundred sixty-three million, four hundred fourteen thousand, two hundred twenty-one".